This may be old news to you - but while watching "The Next Food Network Star," Ben and I learned from contestant Melissa that when you buy green onions, you can save the white parts at the bottom and put them in water, and they will grow again. We thought that sounded pretty neat, so we decided to try it - and in just two days, each onion has grown almost two inches back! This is great and super easy, especially for someone like me who has basically no sense in anything like gardening. And we will have nice fresh green onions the next time we need them, without having to worry about purchasing them or having the excess go rotten. Nice tip.