Pizza Casserole

This makes a lot, so I usually half it or make it all and either freeze it or give it to someone.

3 C uncooked spiral pasta
2 lbs ground beef
1 medium onion, chopped
2 cans (8 oz each) mushroom stems and pieces, drained
1 can (15 oz) tomato Sauce
1 jar (14 oz) pizza sauce
1 can (6 oz) tomato paste
½ tsp sugar
½ tsp garlic powder
½ tsp onion powder
½ tsp dried oregano
3-4 c (16 oz) shredded mozzarella cheese, divided
1 pkg (3 ½ oz) sliced pepperoni
½ c grated Parmesan cheese

Cook pasta according to package directions. Meanwhile, cook beef and onion over medium heat until meat is no longer pink; drain. Stir in the mushrooms, tomato sauce, pizza sauce, tomato paste, sugar and seasonings. Drain pasta; stir into meat sauce.

Divide half of the mixture between two greased 11in x 7 in x 2 in. baking dishes (or a 9x13 pan and a 9x9 pan); sprinkle each with 1 c of mozzarella cheese. Repeat layers. Top with pepperoni and Parmesan cheese. Cover and bake at 350 for 20 minutes. Uncover; bake 10-15 minutes longer or until heated through.