Bean Casserole

Ingredients

• 1 (15 oz.) can lima beans, drained
• 1 (15 oz.) can green beans, drained
• 1 (15 oz.) can kidney beans (do not drain)
• 1 lb. 11 oz. can baked beans (do not drain)
• 1 large onion, cut in thin slices
• 3/4 c. brown sugar
• 1 tsp. dry mustard
• 1/2 tsp. garlic powder
• 1/2 tsp. salt
• 1/2 c. vinegar