Vegetarian Calico Beans
["1/2 c. diced onion", "1/2 c. brown sugar", "1/2 c. ketchup", "1 Tbsp. mustard", "1 (16 oz.) can each: baked small pea beans, lima beans and red kidney beans"]
["Put all ingredients into a pot and cover with foil.", "Bake at 300\u00b0 for 1 1/2 hours."]
["onion", "brown sugar", "ketchup", "mustard", "beans"]