Three Bean Casserole

Ingredients

• 1 to 1 1/2 lb. ground beef
• 3/4 lb. diced bacon
• 1 c. chopped onion
• 2 lb. canned pork and beans
• 1 lb. canned kidney beans, drained
• 1 lb. canned butter beans, drained
• 1 c. catsup
• 1/4 c. brown sugar
• 1 tsp. liquid smoke (optional)
• 3 tsp. white vinegar
• 1 tsp. salt
• pepper to taste