1 lb. ground beef
1 cup chopped onion
3 (15 oz. ea.) cans pork and beans
1 tbsp. cider vinegar
2 tbsp. yellow mustard
1 cup ketchup (Hunts)
1/2 cup brown sugar

Brown and drain meat and onion. Mix all ingredients. Bake at 400°F for 35 to 40 minutes. Cook in slow cooker 3 to 4 hours. Can cook overnight to take to carry-in noon meal.