Stir together kidney and pinto beans, onion, green pepper, chili powder, cumin, diced tomatoes and broth in slow cooker bowl. Cover and cook on HIGH for 4 hours or LOW for 6 hours.
Remove cover and mash beans gently with a potato masher until liquid has thickened slightly. Stir in corn, meat crumbles and barbecue sauce
and cook an additional 30 minutes or until heated through. Top with cilantro, cheese and sour cream, if desired. Serve immediately.