1 can lima beans, drained
1 can kidney beans, drained
1 can butter beans, drained
1 lg. can pork and beans, drained
1/2 lb. bacon, diced
1 c. brown sugar
2 tbsp. vinegar
1 lg. onion, chopped
1/4 tsp. dry mustard

Preheat oven to 325 degrees. Mix all ingredients together in casserole dish. Bake 1 1/2 hours.