I’m fascinated by this concept from DIY. I found it here and decided to try it. What you are looking at are three scrawny green onion roots. You just put them in water in a sunny place, change the water every few days and watch them grow. I have mine on my computer desk in the sunroom with a western exposure. Here’s more pictures from another blogger who was successful with it.
I’m pretty skeptical but I will be fun to see if it actually works.