Greetings! In this guide, I will share with you a simple yet effective method to freeze artichokes and preserve their freshness for months. By following these easy steps, you can ensure that your artichokes stay delicious and nutritious for future use.
Artichokes are a versatile vegetable with a unique flavor, but they can be quite perishable. Freezing them not only helps to extend their shelf life but also allows you to enjoy their goodness even when they are out of season. So, letโs dive in and learn how to freeze artichokes to perfection!
Key Takeaways:
- Freezing artichokes is a great way to preserve their freshness and extend their shelf life.
- Proper preparation and blanching are essential steps for successful artichoke freezing.
- Packaging the blanched artichokes in airtight containers or freezer bags is crucial to prevent freezer burn.
- Thaw the frozen artichokes in the refrigerator overnight or defrost in the microwave before cooking.
- Frozen artichokes can be used in various recipes, adding a burst of flavor and nutritional benefits.
Why Freeze Artichokes?
Freezing artichokes is a convenient method of preservation that allows you to enjoy their delicious flavor and nutritional benefits even when they are out of season. It is a great way to prevent food waste and save money by utilizing excess artichokes. Freezing vegetables, like artichokes, helps to preserve their nutrients and maintain their quality for a longer period of time.
When it comes to preserving vegetables, freezing is a popular choice because it helps to retain the nutritional value of the food. Vegetables like artichokes are packed with essential vitamins, minerals, and antioxidants that contribute to a healthy diet. By freezing artichokes, you can ensure that these nutrients are preserved and ready to be enjoyed whenever you need them.
In addition to preserving nutrients, freezing artichokes also helps to maintain their taste and texture. Artichokes have a unique flavor and tender, meaty texture that can be enjoyed in a variety of dishes. Freezing them allows you to preserve these qualities for future use, whether itโs in a hearty stew, a refreshing salad, or a tasty dip.
Preserving the Freshness of Artichokes
One of the main advantages of freezing artichokes is the ability to extend their shelf life. Fresh artichokes can spoil quickly, but by freezing them, you can keep them fresh for up to 6-8 months. This means you can enjoy artichokes even when they are not in season, giving you more flexibility in your culinary endeavors.
By freezing artichokes, you can also reduce food waste. Instead of letting excess artichokes go to waste, simply freeze them for later use. This not only helps to save money, but it also contributes to a more sustainable lifestyle by making the most out of the produce you have.
Convenience and Versatility
Another reason to freeze artichokes is the convenience it offers. Having a stash of frozen artichokes in your freezer means you always have them on hand whenever you need them. Whether youโre preparing a last-minute meal or experimenting with new recipes, having frozen artichokes readily available can save you time and make cooking more enjoyable.
Furthermore, frozen artichokes are incredibly versatile. They can be used in a wide range of dishes, from simple appetizers to complex main courses. Whether youโre adding them to pasta, pizza, or soups, frozen artichokes can elevate the flavors and textures of your dishes.
Choosing Artichokes for Freezing
When it comes to freezing artichokes, selecting the right ones is crucial for achieving the best results. You want to choose artichokes that are firm and fresh, as this will ensure that they freeze well and retain their quality during storage.
Look for artichokes with tightly closed leaves and a vibrant green color. Avoid artichokes that have begun to wilt or have brown spots, as these are signs that they are past their prime. Additionally, make sure to check the stems of the artichokes. They should be firm and not mushy.
Before freezing the artichokes, itโs important to properly prepare and trim them. Start by removing any tough outer leaves and trimming the stem. Cut off the top of the artichoke and use a spoon to scoop out the fuzzy choke. Trimming the artichokes not only ensures that you are freezing the tender parts, but it also enhances their texture and taste.
By choosing the right artichokes and properly preparing them for freezing, you can ensure that your frozen artichokes will be of the highest quality, ready to be used in your favorite recipes.
Table: Artichoke Selection Guidelines
Artichoke Selection Criteria | Guidelines |
---|---|
Leaves | Tightly closed |
Color | Vibrant green |
Wilted or Brown Spots | Avoid |
Stem | Firm, not mushy |
Table: Artichoke Selection Guidelines
- Tightly closed leaves
- Vibrant green color
- Avoid wilted or artichokes with brown spots
- Firm stem, not mushy
Choosing the right artichokes is essential for freezing success. Look for firm artichokes with tightly closed leaves and a vibrant green color. Avoid those that are wilted or have brown spots. Remember to trim and prepare the artichokes before freezing to ensure the best quality and taste.
Blanching Artichokes
Blanching is a crucial step in the freezing process of artichokes. It involves briefly boiling the artichokes to par-cook them before freezing. Blanching helps to maintain the color, texture, and flavor of the artichokes during freezing. This step also helps to destroy enzymes that can cause the artichokes to spoil.
Why is Blanching Important?
Blanching artichokes before freezing is important for several reasons. Firstly, it helps to preserve the vibrant green color of the artichokes, ensuring they look appetizing even after they have been stored in the freezer. Blanching also helps to maintain the texture of the artichokes, preventing them from becoming mushy or tough. Additionally, the blanching process helps to preserve the flavor of the artichokes, allowing them to retain their delicious taste even after they have been frozen.
By blanching artichokes, you are also destroying enzymes that can cause the artichokes to spoil during storage. These enzymes are naturally present in the artichokes and can lead to discoloration and loss of flavor over time. By blanching the artichokes, you are effectively deactivating these enzymes, ensuring that the frozen artichokes remain fresh and flavorful for an extended period.
The Blanching Process
The process of blanching artichokes is relatively simple. Start by bringing a large pot of water to a boil. Add lemon juice to the water to prevent browning of the artichokes. While the water is boiling, prepare the artichokes by removing any tough outer leaves and trimming the stems. Cut off the top of the artichokes and use a spoon to scoop out the fuzzy choke. Once the artichokes are prepared, carefully place them in the boiling water and cook them for about 10 minutes or until they are slightly tender. After blanching, remove the artichokes from the boiling water and transfer them to a bowl of ice water to stop the cooking process. Drain the artichokes well before packaging them for freezing.
Blanching artichokes is a simple yet important step in the freezing process. By taking the time to blanch your artichokes properly, you can ensure that they maintain their color, texture, and flavor during storage. So, donโt skip this crucial step when freezing artichokes!
Benefits of Blanching Artichokes | Process of Blanching Artichokes |
---|---|
|
|
Trimming and Preparing Artichokes for Blanching
Properly trimming and preparing artichokes is a crucial step before blanching them. This ensures that only the tender parts of the artichokes are frozen and helps to enhance their texture and taste. Hereโs a step-by-step guide on how to trim and prepare artichokes for blanching:
1. Remove tough outer leaves: Start by removing any tough outer leaves from the artichoke. These leaves are often fibrous and can be unpleasant to eat. Peel away the tough leaves until you reach the more tender ones.
2. Trim the stem: Trim the stem of the artichoke, removing any tough or woody parts. Leave about an inch of the stem intact, as it is also edible and adds flavor to the artichoke.
3. Cut off the top: Use a sharp knife to cut off the top of the artichoke. This removes the prickly tips and exposes the inner leaves.
4. Scoop out the fuzzy choke: Take a spoon and scoop out the fuzzy choke (the center portion) of the artichoke. This part is not edible and can be bitter. Make sure to remove all the fuzzy strands.
Once you have completed these steps, your artichokes are ready to be blanched.
Table: Comparing Different Artichoke Trimming Techniques
Technique | Description |
---|---|
Traditional Trimming | Remove tough outer leaves, trim the stem, cut off the top, and scoop out the fuzzy choke. |
Quick Trimming | Remove tough outer leaves, trim the stem, and cut off the top without scooping out the fuzzy choke. |
Minimal Trimming | Remove only the very tough outer leaves and trim the stem slightly, leaving the top and fuzzy choke intact. |
While traditional trimming is the most thorough method, quick trimming and minimal trimming are suitable options if youโre short on time or prefer a simpler approach. However, keep in mind that removing the fuzzy choke is essential for the best eating experience.
โProperly trimming artichokes before blanching is key to ensure the best texture and taste. Removing the tough outer leaves, trimming the stem, cutting off the top, and scooping out the fuzzy choke all contribute to a more enjoyable dining experience.โ
By properly trimming and preparing artichokes for blanching, you can ensure that they freeze well and retain their quality during storage. This step enhances the overall taste and texture of the artichokes and makes them ready for a variety of culinary uses.
Blanching Artichokes: Step-by-Step
Blanching is a crucial step in the freezing process of artichokes. It helps to preserve the color, texture, and flavor of the artichokes while also preventing spoilage. Follow these step-by-step instructions to properly blanch artichokes:
Step 1: Prepare the Artichokes
Start by selecting fresh, firm artichokes. Trim the tough outer leaves, cut off the top, and remove the fuzzy choke. Rinse the artichokes well under cold water to remove any dirt or debris.
Step 2: Boil the Water
Bring a large pot of water to a rolling boil. Add lemon juice to the water to prevent the artichokes from browning during blanching.
Step 3: Blanch the Artichokes
Place the prepared artichokes in the boiling water and cook them for about 10 minutes or until they become slightly tender. The exact cooking time may vary depending on the size and freshness of the artichokes. Avoid overcooking them as they will become mushy.
Step 4: Ice Water Bath
Once blanched, remove the artichokes from the boiling water using a slotted spoon or tongs. Immediately transfer them to a bowl filled with ice water. This will help stop the cooking process and preserve the vibrant green color.
Step 5: Drain and Freeze
After the artichokes have cooled in the ice water bath for a few minutes, remove them and allow them to drain thoroughly. Once drained, package them in airtight containers or freezer bags, ensuring to remove as much air as possible. Label the containers with the date and contents and store them in the coldest part of the freezer.
Step | Instructions |
---|---|
Step 1 | Select fresh, firm artichokes. Trim the outer leaves, cut off the top, and remove the fuzzy choke. Rinse well. |
Step 2 | Bring a pot of water to a rolling boil. Add lemon juice to prevent browning. |
Step 3 | Place artichokes in boiling water and cook for about 10 minutes or until slightly tender. |
Step 4 | Transfer blanched artichokes to a bowl of ice water to cool and preserve color. |
Step 5 | Drain blanched artichokes and package them in airtight containers or freezer bags. Label and freeze. |
Packaging and Freezing Artichokes
After blanching and draining the artichokes, itโs essential to package them properly for freezing. This step ensures that the artichokes remain fresh and maintain their quality during storage. Here are the instructions for packaging and freezing artichokes:
- Step 1: Place the blanched artichokes in airtight containers or freezer bags. Ensure that the containers or bags are clean and free of any moisture or excess air.
- Step 2: Remove as much air as possible from the containers or bags to prevent freezer burn. One method is to use a straw to suck out the air before sealing the containers or bags.
- Step 3: Label the containers or bags with the date and contents. This will help you easily identify the frozen artichokes when you need them.
- Step 4: Store the packaged artichokes in the coldest part of the freezer. This will maintain their freshness and quality.
By following these packaging and freezing instructions, you can enjoy the taste and nutritional benefits of artichokes for up to 6-8 months. Remember to thaw the frozen artichokes properly before using them in your recipes.
Step | Instructions |
---|---|
1 | Place the blanched artichokes in airtight containers or freezer bags. |
2 | Remove as much air as possible to prevent freezer burn. |
3 | Label the containers or bags with the date and contents. |
4 | Store the packaged artichokes in the coldest part of the freezer. |
Proper packaging and storage are crucial for maintaining the texture, flavor, and quality of frozen artichokes. By following these instructions, you can ensure that your frozen artichokes remain delicious and ready to use whenever you need them.
Thawing and Cooking Frozen Artichokes
When it comes to using frozen artichokes, the thawing process is key. There are two methods you can use to thaw your frozen artichokes: refrigeration or microwave defrosting.
If you have time, thawing your artichokes in the refrigerator overnight is the best option. Simply transfer the frozen artichokes from the freezer to the refrigerator and let them thaw slowly. This gradual thawing process helps to preserve the texture and flavor of the artichokes.
For a quicker thawing method, you can use your microwave on a low setting. Place the frozen artichokes in a microwave-safe bowl and defrost them using the microwaveโs defrost function or a low power setting. Be sure to check them frequently to prevent any part of the artichokes from cooking.
Once your frozen artichokes are thawed, you can proceed to cook them according to your desired recipe or preference. Whether you want to incorporate them into a dip, soup, salad, or braise them until tender, frozen artichokes provide a convenient and delicious way to add this flavorful vegetable to your meals.
Thawing Methods for Frozen Artichokes:
- Refrigeration: Transfer the frozen artichokes to the refrigerator and let them thaw overnight. This method preserves the texture and flavor of the artichokes.
- Microwave Defrosting: Place the frozen artichokes in a microwave-safe bowl and defrost them using the microwaveโs defrost function or a low power setting. Check them frequently to prevent any part of the artichokes from cooking.
Cooking Frozen Artichokes:
- After thawing, cook the artichokes according to your desired recipe or preference.
- Add them to dips, soups, salads, or braise them until tender.
- Get creative with your cooking and explore different ways to incorporate frozen artichokes into your favorite dishes.
โThawing and cooking frozen artichokes is the key to unlocking their delicious taste and versatility in the kitchen. Whether you choose to thaw them overnight in the refrigerator or use the microwave defrosting method, these tender and flavorful artichokes can be transformed into a wide range of dishes. From dips to soups and salads, the options are endless. So donโt let the convenience of frozen artichokes go to waste โ thaw them, cook them, and enjoy!โ
Recipes Using Frozen Artichokes
When it comes to cooking with frozen artichokes, the possibilities are endless. Their versatile flavor and texture make them a great addition to a variety of dishes. Whether youโre looking to create a hearty stew, a creamy dip, or a vibrant salad, frozen artichokes can add a unique and delicious twist to your recipes.
Here are a few recipe ideas to get you started:
1. Tomato Braised Artichokes
This flavorful dish combines the sweetness of tomatoes with the tanginess of artichokes. Simply sautรฉ frozen artichokes in olive oil until they start to brown, then add canned tomatoes, garlic, and herbs. Let it simmer until the artichokes are tender and the flavors have melded together. Serve this tomato braised artichoke dish as a side or over pasta for a satisfying meal.
2. Grilled Artichokes with Dipping Sauce
Grilling frozen artichokes brings out their smoky and slightly charred flavor. Simply thaw the artichokes, brush them with olive oil, and grill until they are tender and lightly charred. Serve them with a tangy dipping sauce made from mayonnaise, lemon juice, garlic, and herbs. This dish makes for a tasty appetizer or a delicious addition to any barbecue spread.
3. Wine-Braised Artichokes
For an elegant and flavorful dish, try wine-braised artichokes. In a deep skillet, combine frozen artichokes, white wine, lemon juice, garlic, and aromatic herbs. Simmer until the artichokes are tender and the wine has reduced into a luscious sauce. Serve these wine-braised artichokes as a side dish or alongside roasted meats for a delicious and sophisticated meal.
Recipe | Ingredients | Instructions |
---|---|---|
Tomato Braised Artichokes |
|
|
Grilled Artichokes with Dipping Sauce |
|
|
Wine-Braised Artichokes |
|
|
These are just a few examples of the delicious dishes you can create with frozen artichokes. Donโt be afraid to get creative and experiment with different flavors and cooking techniques. With frozen artichokes, you can enjoy the taste of this flavorful vegetable any time of the year.
Other Methods of Preserving Artichokes
Aside from freezing, there are several other methods you can use to preserve artichokes and enjoy their delicious flavor throughout the year. These alternative preservation techniques offer unique benefits and can add variety to your culinary repertoire.
Pickling Artichokes
Pickling is a popular method of preserving artichokes that adds a tangy and savory flavor to the vegetable. To pickle artichokes, first, clean and prepare them by removing the tough leaves and trimming the stem. Then, cook the artichokes in a mixture of water, vinegar, and spices until they are tender. Finally, pack the cooked artichokes into sterilized jars and pour the pickling liquid over them. Seal the jars and store them in a cool, dark place. Pickled artichokes can be enjoyed as a standalone snack, added to salads, or used as a flavorful topping for sandwiches and pizzas.
Storing Artichokes in Oil
Preserving artichokes in oil is another delicious method that imparts a rich and intense flavor. To do this, blanch the artichokes to retain their color and texture and then marinate them in a mixture of oil, herbs, and spices. Store the marinated artichokes in sterilized jars, making sure they are completely submerged in the oil. This method creates tender and flavorful artichokes that can be used in salads, antipasti platters, or as a gourmet addition to pasta dishes.
Refrigerator Storage
If you prefer to preserve fresh artichokes without using any preservation methods, you can store them in the refrigerator for a short period of time. Simply cut off the stalks, wrap the artichokes in damp paper towels, and place them in a perforated plastic bag. The damp paper towels will help to maintain the moisture and freshness of the artichokes. This method allows you to keep the artichokes fresh for up to 2 days, giving you the option to enjoy them in their natural state or use them in various recipes.
Artichoke Preservation Methods | Benefits |
---|---|
Pickling | Provides a tangy and savory flavor |
Storing in Oil | Imparts a rich and intense flavor |
Refrigerator Storage | Preserves freshness for a short period of time |
By exploring these alternative preservation methods, you can savor the unique taste of artichokes year-round. Whether you choose to pickle them, store them in oil, or simply keep them fresh in the refrigerator, these methods offer a range of flavors and culinary possibilities. Experiment with different recipes and techniques to find your favorite way of preserving and enjoying artichokes.
Storing Fresh Artichokes
When it comes to storing fresh artichokes, there are a few simple methods that can help maintain their freshness for a short period of time. One method is to cut off the stalks and place the artichokes in a jar of water. This keeps them hydrated and prevents them from drying out. Another option is to wrap the artichokes in damp paper and store them in the refrigerator. The moisture from the paper helps to keep the artichokes fresh and crisp.
Regardless of the method you choose, it is important to store the artichokes in the refrigerator. The cool temperature helps to slow down the ripening process and extends their shelf life. Fresh artichokes can be stored using these methods for up to 2 days, allowing you to enjoy them at their peak freshness.
Itโs important to note that while storing fresh artichokes can help maintain their freshness, freezing them is the best method for long-term preservation. Freezing artichokes allows you to enjoy their flavors and benefits for an extended period of time, up to 6-8 months. If you have an abundance of fresh artichokes and want to enjoy them throughout the year, freezing is a convenient and effective option.
Tips for Storing Fresh Artichokes:
- Choose fresh, firm artichokes for storing.
- Cut off the stalks and place the artichokes in a jar of water or wrap them in damp paper.
- Store the artichokes in the refrigerator to maintain their freshness for up to 2 days.
- For long-term preservation, consider freezing artichokes.
By following these tips, you can ensure that your fresh artichokes stay fresh and flavorful for as long as possible. Whether you choose to store them in the refrigerator or freeze them for later use, artichokes are a versatile and delicious vegetable that can be enjoyed year-round.
Tips for Successful Artichoke Freezing
When it comes to freezing artichokes, there are a few key tips to keep in mind to ensure successful preservation. By following these guidelines, you can maintain the flavor, texture, and quality of your artichokes even after months in the freezer.
1. Use fresh and firm artichokes for freezing.
When selecting artichokes for freezing, choose those that are firm and fresh. Look for artichokes with tightly closed leaves and a vibrant green color. Fresh artichokes will freeze better and retain their quality during storage.
2. Properly trim and prepare the artichokes before blanching.
Before blanching the artichokes, itโs important to properly trim and prepare them. Remove any tough outer leaves and trim the stem. Cut off the top of the artichoke and use a spoon to scoop out the fuzzy choke. Trimming the artichokes ensures that only the tender parts are frozen and helps enhance their texture and taste.
3. Blanch the artichokes for the recommended time to preserve their quality.
Blanching is a crucial step in the freezing process. It helps maintain the color, texture, and flavor of the artichokes. Follow the recommended blanching time, typically around 10 minutes, to ensure that the artichokes are slightly tender and ready for freezing.
4. Drain the blanched artichokes well before freezing.
After blanching, itโs important to drain the artichokes well to remove excess moisture and prevent ice crystals. Allow them to cool and dry before packaging them for freezing to avoid any potential freezer burn or loss of quality.
5. Package the artichokes in airtight containers or freezer bags, removing excess air.
Proper packaging is essential for preserving the artichokesโ freshness. Place the blanched artichokes in airtight containers or freezer bags, removing as much air as possible to minimize the risk of freezer burn. Label the containers with the date and contents for easy identification.
6. Store the frozen artichokes in the coldest part of the freezer.
To maintain the quality of the frozen artichokes, store them in the coldest part of the freezer. This will help retain their flavor and prevent any potential temperature fluctuations that may affect their texture or taste.
By following these tips, you can confidently freeze artichokes and enjoy their delicious flavor even when they are out of season. With proper preparation and storage, frozen artichokes can be a convenient and versatile ingredient that adds a burst of flavor to your favorite dishes.
Enjoying Frozen Artichokes Year-Round
When it comes to enjoying artichokes year-round, freezing is the way to go. Freezing artichokes allows you to preserve their freshness and extend their shelf life for up to 6-8 months. With this simple preservation method, you can have artichokes on hand whenever you need them, whether itโs for cooking up your favorite recipes or adding a delicious touch to your meals.
By freezing artichokes for later use, you ensure that you always have this versatile vegetable available. From hearty stews and comforting soups to vibrant salads and mouthwatering dips, frozen artichokes can be used in a variety of dishes to elevate their flavor profile. Plus, freezing artichokes helps retain their nutritional value, so you can still benefit from their vitamins, minerals, and antioxidants even after theyโve been stored in the freezer.
When it comes to cooking with frozen artichokes, the possibilities are endless. You can sautรฉ them with garlic and olive oil, roast them until golden and crispy, or simply add them to your favorite pasta or rice dishes. Their unique taste and texture will add depth and complexity to any recipe, making them a delicious addition to your culinary repertoire.
Benefits of Freezing Artichokes | Cooking Ideas |
---|---|
|
|
With frozen artichokes, you can enjoy the flavors of this delicious vegetable no matter the season. So go ahead, stock up on artichokes, freeze them for later use, and explore the endless cooking possibilities they offer. From savory appetizers to satisfying main courses, frozen artichokes will add a burst of flavor and a touch of sophistication to your meals, ensuring that you always have a taste of freshness at your fingertips.
Conclusion
In conclusion, freezing artichokes is a fantastic way to prolong their freshness and enjoy their flavors year-round. By following the steps outlined in this freezing guide, you can ensure that your frozen artichokes retain their taste, nutrients, and quality for up to 6-8 months in the freezer.
Frozen artichokes offer a convenient and versatile option for incorporating this delicious vegetable into various recipes. Whether you prefer to use them in dips, soups, salads, or as a standalone side dish, the possibilities are endless. With their extended shelf life, you can always have artichokes on hand for cooking and entertaining.
So, donโt hesitate to give freezing artichokes a try. Itโs a simple and effective way to preserve these flavorful gems and add a touch of gourmet to your meals. Include them in your next shopping list and embark on a frozen food adventure that will elevate your culinary creations to new heights!
FAQ
How long can I store frozen artichokes?
Frozen artichokes can be stored for 6-8 months.
Can I freeze artichokes without blanching them?
Blanching is necessary to preserve the quality and color of artichokes during freezing.
How do I thaw frozen artichokes?
You can thaw frozen artichokes in the refrigerator overnight or defrost them in the microwave on a low setting.
What can I use frozen artichokes for?
Frozen artichokes can be added to dips, soups, salads, or braised until tender. They are versatile and can be used in various recipes.
Can I freeze artichokes in oil?
Yes, you can blanch and freeze artichokes in oil for a different preservation method.
How long can I store fresh artichokes in the refrigerator?
Fresh artichokes can be stored in the refrigerator for up to 2 days.
What should I look for when selecting artichokes for freezing?
Choose firm and fresh artichokes with tightly closed leaves and a vibrant green color.
How should I package frozen artichokes?
Place blanched artichokes in airtight containers or freezer bags, removing as much air as possible to prevent freezer burn.
Can I freeze artichokes without trimming them?
Properly trimming artichokes is important to enhance their texture and taste during freezing.
Can frozen artichokes be used in different cooking methods?
Yes, frozen artichokes can be braised, grilled, or used in various recipes like tomato braised artichokes or wine-braised artichokes.
Are there other methods for preserving artichokes?
Yes, you can also store artichokes in the refrigerator, blanch and freeze them in oil, or pickle them for different preservation techniques.
What are some tips for successful artichoke freezing?
Use fresh and firm artichokes, blanch them for the recommended time, drain them well before freezing, and package them properly in airtight containers or freezer bags.
How can I enjoy frozen artichokes year-round?
Thaw and cook frozen artichokes according to your desired recipe or preference to incorporate them into your meals throughout the year.
Source Links
- https://www.oceanmist.com/blog/cook-now-eat-later-make-ahead-meals
- http://artichokes.org/freezing-artichokes
- https://www.lacucinaitaliana.com/italian-food/how-to-cook/how-to-keep-artichokes-fresh-in-different-ways