Three Bean Casserole

Ingredients

• 1 large can lima beans, drained
• 1 large can kidney beans, drained
• 1 large can pork and beans
• 5 slices minced bacon
• 1 lb. hamburger
• 1 chopped onion
• 1/2 c. brown sugar
• 1/2 c. catsup
• 2 Tbsp. vinegar
• 1 tsp. salt
• 1 can French fried onion rings