I tried this "you can grow more vegetables from your vegetable trimmings" thing. Nothing worked. Once the vegetable that was growing started to mature and had to be moved out of water into soil, the vegetable died. (This was all done during the initial "2 weeks to flatten the curve".
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I did radish, onion and carrot tops. All ended up failing when transferred to soil. Unless you are going to only eat the greens growing... However the point with radishes and carrots would be to grow new radishes, new carrots.
The biggest issue with using water is that the water must be changed daily. Bacteria in these homegrown vegetables is problematic. Do your research.