Saute onions & peppers. Mash black beans in bowl. Add sauteed onions & peppers. Add BBQ sauce (about 1/2 cup). Mix together. Add enough bread crumbs to make the consistency of the mixture so you can make patties out of it (approx. 4 patties). Fry (in olive or canola oil) like you would a regular beef burger. When you serve this on a hamburger roll, it makes a complete protein. Serve with fries and veggies and you have a healthy vegetarian meal.