This was, or is what is left of a red cabbage bought at the super market. You cook and use them much like any other cabbage, except they are slightly sweeter in my opinion and turn the whole dish red if stewed.
I'd progressively peeled off the leaves as required for various dishes. At one point I had noticed on the bottom of the cut stem, what suspiciously looked like tiny roots. So I thought, I'd give it a go and see if I could encourage it to grow some healthy roots. If successful I'd plant it in soil.
As you can see from the photo, it did indeed grow a copious amount of white roots when placed in water. The extra bonus to notice, is the new leaves now sprouting from the side of the stem where I had cut off the leaves.
Previously I'd seen a YouTube video where they had planted leftover kitchen vegetables and grown them. They'd planted the stump of a lettuce that they'd cut the head off, and some time later, it had grown six new full heads of lettuce.
Hence, I'm hoping for a similar outcome with my cabbage. I'll report back on the outcome.
If you have the means, soil, space, sun, water and time, growing new vegetables from your leftovers is a great way of saving money and keeping supplementing your food supply.