01 -
Preheat oven to 190°C and position the rack in the upper third of the oven.
02 -
Bring a large pot of salted water to a boil. Cook penne for approximately 2 minutes less than the package instructions indicate. Drain and return to the cooking pot.
03 -
Stir marinara sauce and roughly one-third of the pepperoni through the drained pasta until evenly coated.
04 -
Spread the pasta mixture evenly in a 23 × 33 centimetre baking or casserole dish.
05 -
Distribute mozzarella cheese evenly over the top, then arrange the remaining pepperoni slices over the cheese.
06 -
Bake uncovered for 20 minutes. For a golden, crisp top, briefly broil on high, monitoring to prevent burning.