This recipe came from my mom's recipe box.
Fry 3 slices of bacon reserving 3 T. bacon drippings. Saute 1/2 cup onions in bacon drippings. Drain and add to 2 cans of pork and beans. I used 1 large can. Then add the following ingredients to the beans and onion mixture: 2 Tablespoons brown sugar, 1 Tablespoon worcestershire sauce, 2 Tablespoons catsup, 1 Tablespoon prepared mustard. Stir until well-combined and add uncooked bacon strips to the top.
Bake uncovered 350 degrees for 1 1/2 hours.