Baked Bean Casserole
["1 large can pork and beans", "1 large can red kidney beans", "1 large onion", "1 tsp. mustard", "1 tsp. vinegar", "1/2 c. brown sugar", "1/2 c. catsup", "1 1/2 lb. ground beef"]
["Brown onion and meat.", "Drain.", "Add remaining ingredients and bake 30 to 45 minutes at 325\u00b0."]
["pork", "red kidney beans", "onion", "mustard", "vinegar", "brown sugar", "catsup", "ground beef"]