Calico Beans

8 ounces bacon, about 10 to 12 slices
1 pound lean ground beef
1 cup chopped onion
1/2 cup brown sugar
1 tbsp. dry mustard
2 cans pork and beans
1 can lima beans or butter beans, drained
1 can kidney beans, drained
1/2 cup ketchup
1 tsp. salt
1 tbsp. vinegar

Brown bacon, ground beef, and chopped onions. Combine drained ground beef mixture in slow cooker with remaining ingredients; cover and cook on LOW for 3 to 5 hours.