You have to be careful of rhubarb. It contains oxalic acid which is a nephrotoxin and also can sometimes cause kidney stones. Don’t eat the leaves.
I see you like beets. I do too. I’ve found you can roast them on the fire. I slice them and put them on the charcoal grill and they’re great.
Whatever you do - don’t feed the beet greens to the chickens! Cook them like spinach. They are especially good when the small plants get pulled up with the larger beets. That way there are tiny beets in with the beet leaves. Better than spinach - which by the way also contains oxalic acid.
Full disclosure: spinach, swiss chard and beet greens all contain some oxalic acid.
My wife roasts them, I cook them on the grill.
Our chef son said to throw whole beets on top of the hot charcoal after you cook the meal and let the heat do its thing and roll them over about every 30 minutes.