This article titled "How To Grow Sprouted Onions" at Alternative Gardening talks about exactly that. I had no idea. All this time, if I didn't eat an onion in time, I would simply plant the whole thing as-is in the soil.
Herbs are the keys to flavor. There’s no shame in using dried herbs, but growing fresh herbs yourself is well worth the effort. Many herbs repel insects, pack great health benefits, and are pretty simple to maintain.