I'm getting to the age where beans are low-fat, high-fiber meat.
Just don't open up a couple cans of cooked beans and dump them in. Soak dried beans overnight, then for the love of God, cook them with some seasonings. A pound of dried beans, and a Tablespoon of toasted whole cumin, lightly cracked, and go ahead and throw some of your dried chilles in there while they cook as well. You want beans that taste like beans and seasonings, not beans that taste like plain beans. Nothing wrong with using flavorful beans, just season them, too.
And a pound of dried beans is like 3 pounds of cooked beans. So don't mix it with a pound of meat and call it good, mix it with three pounds of meat. I do diced beef, but I'm told leftover pulled pork is good, I just have never seen _leftover_ pulled pork.