01 -
Boil the spaghetti in a large pot of salted water according to package directions until al dente. Drain thoroughly.
02 -
While spaghetti is cooking, heat a large skillet over medium-high heat. Add ground beef, diced red onion, sliced mushrooms, and diced bell pepper. Sauté until the beef is fully browned and vegetables are softened. Drain excess fat.
03 -
Stir in Italian seasoning, onion powder, garlic powder, and seasoned salt to evenly coat the beef and vegetables.
04 -
Add several pepperoni slices, most of the bacon crumbles, pizza sauce, and pasta sauce to the skillet. Stir to blend all ingredients and let simmer gently for 3–5 minutes.
05 -
Add the drained spaghetti to the skillet and toss thoroughly to combine with sauce, beef, and vegetables.
06 -
Transfer the spaghetti mixture to a baking dish. Sprinkle mozzarella cheese evenly over the top. Garnish with remaining bacon, onions, black olives, bell peppers, and the rest of the pepperoni.
07 -
Bake in a preheated oven at 175°C for 10 minutes. Switch to broil for an additional 2–3 minutes until the cheese is bubbling and golden brown.
08 -
Remove from the oven and serve warm.