Baked Beans

Ingredients

• 1 can pork and beans
• 1 can lima beans
• 1 can kidney beans
• 1/2 c. ketchup
• 1/2 c. brown sugar
• 1/4 c. vinegar
• 2 tsp. white sugar
• 1 tsp. mustard
• 1/2 tsp. salt
• 1/4 tsp. pepper
• 1 onion (medium)