Place your green onions in a jar, and fill with an inch or two of water (just enough to cover the roots). Then, place the jar on the windowsill in your kitchen. Your onions will not only stay fresh, but continue to grow. Change or add water every couple days, as needed.
Green onions (or scallions) may seem one of those foods that doesn't seem worth dehydrating....but think again! You can do something amazing with them to make them more versatile in your PREPared kitchen!