I made this a lot when my kids were younger. This was one of their favorites.
1 small jar tomato sauce
1 small jar pizza sauce
1 pound pasta twists cooked and cooled (cook 1 - 2 minutes less so the pasta doesn't get overcooked in the oven)
1 pound lean ground beef
1 package sliced pepperoni
2 cups mozzarella cheese
1/2 cup grated parmesan cheese
Brown the ground beef and drain off the fat.
Mix the tomato sauce, pizza sauce and pepperoni together in the pan.
Spray a large casserole with cooking spray and add the pasta.
Pour the meat mixture over the pasta and mix well.
Add the parmesan cheese and mix together.
Top with the mozzarella cheese and bake for 15 minutes, until the cheese is nice and bubbly.
You can add any pizza topping your kids like.