Three Bean Casserole
["2 (16 oz.) cans butter beans", "1 (16 oz.) can kidney beans", "2 (16 oz.) cans pork and beans", "1 large onion", "1 c. brown sugar", "2 c. catsup", "2 (12 oz.) pkg. Polish sausage, sliced", "1 Tbsp. mustard", "1 Tbsp. vinegar"]
["Brown Polish sausage and onion; drain.", "Mix all ingredients in a large casserole and bake 45 minutes to 1 hour at 350\u00b0."]
["butter beans", "kidney beans", "pork", "onion", "brown sugar", "catsup", "sausage", "mustard", "vinegar"]