1 lb. ground meat (beef)
1 sm. onion
2 tbsp. vinegar
1 (#2) can pork & beans
1 (#2) can red kidney beans
1 (#2) can green Lima beans
1 c. ketchup
1 tsp. mustard

Brown meat, drain. Mix rest of ingredients. Put in large casserole dish and bake at 350 degrees for 1 hour.