1 lb. hamburger
1 can pork and beans
1 can kidney beans
1 can butter beans
1/2 med. onion, chopped
1/2 c. brown sugar
1 tbsp. mustard
1/2 c. ketchup

Brown hamburger and onion. Drain fat. Add remaining ingredients - do NOT drain water from beans. Bake uncovered 1 hour at 350 degrees.