How to Make Pizza Casserole:

• Preheat oven to 350 degrees F. Spray a 2-quart (8 x8) baking dish with cooking spray.
  cooking spray
• Cook pasta according to package directions, drain and set aside. In a nonstick skillet heat oil over medium-high heat. Sauté onions and mushrooms until softened and browned, about 10 minutes.
  2 heaping cups dry penne pasta, 2 tbsps. olive oil, 1-1/4 cups diced yellow onion, 8 oz. fresh mushrooms, sliced
• In a medium sized bowl, combine pizza sauce, tomatoes and onion-mushroom mixture. Spread a thin layer of this sauce on the bottom of the baking dish. Top with half the cooked penne pasta. Sprinkle half the salami, pepperoni and olives. Top with half the sauce and 1 cup of the Parmesan cheese. Repeat with remaining pasta, salami, pepperoni, olives, sauce and finally cheese. Your pasta will be piled high in the baking dish and it will cook down.
  2 cups pizza sauce, 1 (15 oz.) can Italian flavored diced tomatoes, 8 oz. diced salami, 1 cup mini pepperoni or regular-sized cut into quarters, 1/2 cup sliced olives, 2-1/2 cups shredded Parmesan cheese
• Bake for 30-35 minutes until cheese is melted and sauce is bubbling. Wait 10 minutes before serving. Garnish with flecks of parsley.
  dried parsley