Cook the Bacon and Sausage: In a large skillet over medium heat, cook the bacon pieces until crispy, about 5-7 minutes. Remove the bacon and drain on paper towels, leaving the grease in the skillet. In the same skillet, add the Italian sausage and cook until browned, breaking it into small pieces with a spatula. If using, add the diced onion and chopped garlic during the last 2-3 minutes of cooking. Drain excess grease if necessary.

Prepare the Filling: Once the sausage is cooked, mix in the pepperoni slices, cooked bacon, and optional black olives. Stir in the pizza sauce and cook for another 2 minutes until heated through. Remove from heat.

Prepare the Bell Peppers: Preheat your oven to 375°F (190°C). Arrange the halved bell peppers in a large baking dish, cut side up. Fill each half of the bell peppers with the meat and sauce mixture, ensuring they are well-packed.

Top with Cheese: Sprinkle the shredded mozzarella cheese evenly over the stuffed peppers.

Bake the Stuffed Peppers: Place the dish in the preheated oven and bake for 20-25 minutes, or until the peppers are tender and the cheese is melted and bubbly.

Serve: Remove from the oven and let the peppers cool slightly before serving. Enjoy these stuffed peppers as a delicious, pizza-inspired meal!