This is a really simple one I did the other day.
I took the great northern/limas soaked them for about an hour. I placed them in the crockpot with onions and instead of putting water in the pot, I used beef broth (2 cans) and one veggie broth, salt, pepper and about 2 tbsp of EVOO. Now you can frozen mixed veggies, but I'd do that after they've cooked down.
If you wanted to do meat: take chicken breasts, black beans, diced tomatoes, onions and corn. Place all of the other ingrediants in first, then add the chicken last. Salt & pepper. Really good, really simple.