One method results in golden brown onions, the other results in translucent onions.
How to Resprout Green Onions
Eat the top, grow a new top, repeat.
How to Chop an Onion Without Crying
Russell Jackson, chef-owner of the now-closed Lafitte in San Francisco, knows that chopping onions can be a real pain in the eye sometimes. In this CHOW Tip he shares a few ideas that might make your onion prep a bit more bearable. Check out this story from The Kitchn if you don't quite buy the bread-in-the-mouth bit.
How to Remove the Skin from Walnuts
Daniel Duane demonstrates how to shimmy walnuts out of their papery covering.