Also known as a scallion.
Title says it all! It is so simple and one of favorite things to do.
When you buy and use the green part of the onion, don’t throw away the white root away.
All you have to do is put it in a glass with a little water. I put enough to cover the root. You’ll want to change the water very often, so it doesn’t get slimy. Also, make sure it gets plenty of sunshine!
When I buy scallions, I like to get the ones with thicker/bigger white roots. I used to get the thinner ones, but noticed they didn’t last as long for me. I keep mine right by the sink to remind myself to change the water. I do this every day or every other day.
It takes about 2-3 days for it to grow enough for you to use. I don’t always cook with it, so mine get really tall.