My cousin Kathy told me about this fun experiment that she's been doing in her kitchen. When she uses scallions, she throws the bottom white parts of the scallions into a cup of water.
Over a week later, the scallions regrow the green tops! How incredibly cool is that? I've never tried this before, but from now on, every time I buy scallions from the supermarket, I will try this! And to think, all this time, I've been throwing the white ends into the compost. From this day forward, I'll try to regrow them! Sustainable scallions, how cool is that?