1 1/2 - 2 c. chopped onion
1 lb. hamburger
1 tsp. salt
2 tbsp. prepared mustard
2 lbs. canned pork & beans
1 lb. can kidney beans, drained
1 c. catsup
2 1/2 tbsp. vinegar
1/2-3/4 c. brown sugar (opt. for sweet & sour taste)

Brown hamburger; add onion and simmer until soft. (Drain fat.) Then add rest of ingredients. Bake at 375 degrees for about 20 to 30 minutes. Our family's picnic favorite.