01 -
Preheat oven to 175°C. Have a 23x33 cm baking dish ready.
02 -
In a large skillet over medium heat, cook ground beef or sausage until browned. Drain off excess fat.
03 -
Add crushed tomatoes, Italian seasoning, and garlic salt to the browned meat. Stir thoroughly to combine and warm through.
04 -
Cook penne pasta in a large pot of boiling salted water according to package instructions until al dente. Drain well.
05 -
Spread half of the drained pasta evenly in the baking dish. Spoon half of the meat sauce over the pasta. Scatter half the shredded mozzarella on top, then arrange half the pepperoni slices over the cheese.
06 -
Layer the remaining pasta, followed by the rest of the meat sauce, mozzarella, and pepperoni. Evenly sprinkle the grated Parmesan cheese over the top.
07 -
Cover the dish with foil and bake in the preheated oven for 30 minutes.
08 -
Remove foil and continue baking for an additional 15 minutes, or until the casserole is bubbling and the cheese is golden. Allow to cool for 5 minutes before serving.