If you like to cook with spring onions (aka green onions, shallots or scallions), did you know you can keep the white root ends in a glass of water and they will regrow almost indefinitely?
Household weblog Homemade Serenity shares how spring onion ends ends can regrow in in a glass of water. Just put the root ends in a glass of water and put that glass in a sunny window. After a few days you should be able to begin harvesting the green ends. Make sure you change the water every so often and cut what you need with scissors before cooking.