Three Bean Bake

Ingredients

• 1 lb. ground chicken or 1 lb. lean hamburg or bacon
• 1 medium onion, chopped
• 1/2 c. brown sugar, packed
• 1/2 c. ketchup
• 2 Tbsp. vinegar
• 1 tsp. dry mustard
• 1 (16 oz.) can kidney beans
• 1 (16 oz.) can butter beans
• 1 (16 oz.) can pork and beans
• dash of salt and pepper