1 lb. ground beef
1 c. onions, chopped
1 tsp. salt
1 c. ketchup
2 tbsp. mustard
1 tbsp. vinegar
1 c. brown sugar
3 (1 lb. cans) pork & beans, drain 1 can

Brown beef and onions in skillet. Drain well. Add remaining ingredients and mix well. Bake in uncovered pan or dish at 400 degrees for 30 minutes.