Pizza Spaghetti Casserole

My husband loves this dish!

Pizza Spaghetti Casserole
1 jar marinara sauce (24 oz)
1 or 2 cans crushed tomatoes (depending on how much spaghetti you use.  If you use the full lb, you may want to use 2 cans crushed tomatoes)
12 oz- 1 lb. spaghetti
2 cups grated Mozzarella cheese
1 lb. sweet Italian sausage
1 8 oz. box mushrooms, sliced
About 1/4 cup parmesan cheese
4 oz. pepperoni slices
Other toppings of choice: sliced olives, green peppers, onions, tomatoes, spinach, etc.

Preheat  oven to 350.
Spray a 13x 9 pan.
Bring a large pot of salted water to a boil.  Break the spaghetti into 1/3rd and put them into the boiling water.  Cook until el dente.  Drain and put into the bottom of the 13 x 9 pan.
In a large skillet, put about 1 T. olive oil and add the sausage.  Cook until browned.  Put the sausage over the spaghetti, leaving the oil in the pan.
Put the mushrooms in the hot pan and saute for about 5 minutes.
Mix together the pasta sauce and tomatoes and put onto the spaghetti and sausage.  Use a fork to get the sauce down into the spaghetti.  Top with the cheeses, mushrooms, pepperoni, and other toppings of choice.
Bake until hot and bubbly and cheese is melted- about 20-30 minutes.