Bean Bake

6 bacon slices
1 medium onion chopped
½ C. ketchup
3 Tbsp. dark brown sugar
1 Tbsp. cider vinegar
1 tsp. salt
1 tsp. dry mustard
1 (16 oz.) can pork and beans
1 (16 oz.) can kidney beans, drained
1 (16 oz.) can lima beans or butter beans, drained

Preheat oven to 350 degrees F. Cook bacon in medium skillet over medium heat until crisp, about 5 minutes. Transfer bacon to paper towels; reserve drippings. Add onions to skillet with drippings and cook until translucent, stirring occasionally, about 7 minutes. Transfer onion with dripping to large bowl. Add next 5 ingredients to bowl. Crumble bacon and add to onion mixture. Mix in pork and beans, lima beans and kidney beans. Transfer to 9 x 13 baking dish. Bake until mixture bubbles, 30 to 35 minutes.