We grow chives in mason jars with a bit of water. We just use the scraps from the store and it roots out and keeps growing. Other than that I have done some of the same as you with lettuce.

Most brassicas excepting cauliflower keep putting out shoots. Collards are probably the most used as a cut and come again green. Bunching onions. can't think of anything else right now.

I think spinach qualifies, although mine usually bolts before I'm able to do much coming again.

Not so much a veggie in this particular use, but garlic is, when grown for the green tops. Plant a bunch of them fairly crowded in a container with at least 4" of potting mix and harvest the tops when 6" tall, makes a great garnish. You'll get several iterations of this before the bulbs run out of juice.

I'm not sure I can think of a green that won't keep producing. Not sure about cutting all the way to the ground, but pulling off leaves and stems will pretty much always leave you with a productive plant. Most root vegetables work this way as well - beets, turnips, etc.

I second the garlic recommendation. Last fall I ended up with a lot of too small heads too late in the season to really do anything with from a friend. Started potting them up around the beginning of December every 3-4 weeks or so, and had fresh garlic greens till about April when they ran out and the spring chives were really coming in. This year I have another goodly handful of small heads I'll do the same thing with.

This was actually my preferred way to do beets. I selected a seed labeled for beet greens. My grandmother mixed mustard, turnip, and spinach greens.

Great ideas everyone. I usually end up with more greens than we can eat although I am freezing some when I can to put in my green smoothie in the morning.

A fruit that actually benefits from a severe cutting is the strawberry. Once my plants were done in early June or so, I cut all of the leaves off and now they’ve grown back stronger and still have some flowers and berries on them! Sounds drastic but works.

My wife also reminded me leeks will grow in water as well. She used the top in a soup recipe and is regrowing the bottom part.

Perfect timing! My chard got away from me, so I think I'll just chop it back and see what I get this fall. Also plant the leek bottoms! Nancy

The deer chopped my chard back and it returned. So did the deer.