A great way to use leftovers to make a new meal.
Preheat oven to 350 degrees Fahrenheit.
Prepare pasta according to package directions.
Drain pasta, toss with pasta sauce.
Layer half the pasta in baking dish. I use a 9x9 square casserole.
Spread half of mozzarella and pepperoni over pasta.
Repeat layers with second half of ingredients.
Top with Parmesan cheese.
Bake for 30 minutes or until bubbly.