Preheat oven 350 degrees F (175 degrees C). Cook the bacon in a large skillet or in the microwave until most of the fat is released, but the bacon is still flexible. Drain on paper towels and set aside.
In a 9-inch square baking dish, combine the baked beans, onion, mustard, ketchup, brown sugar and apple. Garnish with slices of bacon.
Bake uncovered for 45 minutes in the preheated oven, until the bacon is crispy and the beans are bubbly.
Enjoy !
