1 (1 lb. 12 oz.) can Bush's baked beans
1 (15 oz.) can pinto beans
1 (15 oz.) can red kidney beans
1 1/2 lb. ground beef
1 med. onion, diced
3 tbsp. French's mustard
Brown sugar

Brown ground beef and onion together in a skillet. Blend together in a 9x13 pan beans, beef, onion, and mustard. Sprinkle brown sugar over the top and bake uncovered for 30 minutes at 325 degrees. Serves 6-8.