Pizza spaghetti

Ingredients:

1 pound spaghetti
1 cup milk
1 egg
1 teaspoon seasoned salt
1 teaspoon garlic salt
4 cups shredded mozzarella cheese, divided
1 (32 ounce) jar spaghetti sauce
1 (3 1/2 ounce) package pepperoni or 3/4 pound ground beef or Italian sausage
1 (4 ounce) can mushrooms (optional)
1 green bell pepper, chopped (optional)
1 onion, chopped (optional)

Preparation:

Cook spaghetti as directions on package. Drain well and put back into pan.
In a separate bowl, beat milk and egg together and mix into spaghetti.
Add seasoned salt and garlic salt. Pour into a greased 9 x 13-inch pan.
Spread spaghetti sauce over top of spaghetti. Stir to mix.
Sprinkle 2 cups of the mozzarella cheese over sauce/spaghetti mixture.
Add pepperoni or ground beef or Italian sausage, mushrooms, green bell pepper and onion to top of spaghetti mixture.
Sprinkle remaining 2 cups mozzarella cheese over top of casserole and bake, uncovered, at 300 degrees F for 1 hour.