We had red chard.
My chicken stock was frozen, but three sandwich bags worth of frozen peels and onion stubbs created a quick vegetable stock while I started the dish. (OK, there were a couple of chicken femurs in there too.)
Stem the greens, rinsing well. Finely dice the stems, and saute these, along with a chopped medium onion, a grated carrot and a chopped celery stalk in some olive oil. Don't skimp on the oil. Use about 3 or 4 tablespoons. Season with s and p and allow to cook down and sweeten, about 10 minutes.
Add a cup of pearl barley and stir to coat with the vegetables and oil. After about a minute, maybe two, add 1/2 glass of white wine. Stir until absored.
Start adding ladlefulls of hot stock to the barley. You'll need about 5 cups in all. It shouldn't be dry, though nor should it be soupy.
Add a few handfuls of chopped greens and allow them to wilt, about two minutes. Add 1/2 can of cooked beans (I like to use a little of the liquid too; it adds a nice mouth feel). Check the seasoning.
You could top this with a drizzle of olive oil, some parmesan cheese, shredded basil...

The leftovers were taken to work the next day. That evening, the final leftovers were introduced into a soup. I sauted onion, carrot and celery, added the leftover barley (and some leftover lentils from Sunday's evening meal, see below), some chopped cabbage, some chicken stock, a frozen arugula pesto ice cube from this spring's early crop, a couple of leftover canned tomatoes and their juice, and some sauteed sweet potato cubes. I sauteed these in duck fat because I had it and it makes them taste good. It was very tasty. Soups are easy. They can be anything.