Planting an overgrown onion in a pot outside gave me 3 harvest of onion leaves and now it's blooming and I will have lots of onion seeds.
It's amazing how much one single #onion produced. Used the leaves in 2 soups and one stew and have 5 or 6 more thick leaves to harvest too. The ROI was lmore than 10x the amount I spent on one onion.