From the "Does that really work" file

I have been hearing all over the place that you can re-grow green onions. After you cut the white part with the root off you throw it in a glass of water and it will regenerate. I tried it out and it does, in fact, work.

The best part about the whole deal is that they don't have to grow in dirt thus eliminating the crap that finds it's way inside the sprouts. There is a downside though, I think they lose a bit of their flavor the more they reproduce. It's like burying your onion in the pet cemetery, as Jud would say, "Sometimes dead is bettah".