To store green onions, or scallions, you should start by removing the rubber band or any other ties that are holding the bunch together. Then, trim the ends of the green onions and wash them under cold water. Once they are clean, wrap them in a paper towel and place them in a plastic bag. The green onions will last for up to two weeks in the fridge. You can also store them in a glass of water, similar to a bouquet of flowers. Just make sure to change the water every few days.
Another option for storing green onions is to chop them and then freeze them. Start by cutting the green onions into small pieces. Then, place them on a baking sheet lined with parchment paper and put them in the freezer for about an hour. Once they are frozen, transfer them to a freezer-safe bag or container. When you are ready to use them, simply take out as much as you need and let them thaw at room temperature. Once they are thawed, you can use them in any recipe that calls for green onions. They will last for up to six months in the freezer.
If you have a large batch of green onions that you want to store for longer than a few weeks, you can dehydrate them. To do this, slice the green onions thinly and place them on a dehydrator tray. Dehydrate them at around 120 degrees Fahrenheit for six to eight hours, or until they are dry and crispy. Once they are dried, store them in an airtight container and they will last for up to a year. You can rehydrate them by adding them to soups or stews or by soaking them in warm water for a few minutes.