1 (28 oz.) can baked beans
1 med. onion, chopped
1/2 c. brown sugar
5 strips bacon, cut in 1-inch pieces
2 tbsp. ketchup
1 tsp. prepared mustard

Fry bacon until crisp. Remove from fat. Saute onion in fat and when tender, drain off fat. Add mustard, ketchup and brown sugar. Stir in the beans. Put in casserole. Top with bacon and bake for 30 minutes at 350 degrees.