Deep Dish Pizza Casserole

I made something new for dinner tonight, this deep dish pizza casserole. It was quick, easy and really good! And it could be customized to include your favorite pizza toppings. I made it with ground beef because that is what I had, but could easily be made with ground chicken, ground turkey, or Italian sausage.

Ingredients 
1lb ground beef
1 med onion chopped
15oz jar of Pizza Sauce
1/2 tsp garlic salt
1/4 cup fresh oregano
8oz mozzarella cheese
2 eggs
1 cup flour
1 cup milk
1 tablespoon vegetable oil
1/2 cup parmesan cheese

Directions
Preheat over to 350. Brown hamburger and onion together and drain well. Add garlic salt, oregano, and pizza sauce and stir well. Meanwhile, grease a 9x13 inch pan with cooking spray and sprinkle the mozzarella cheese on the bottom of it.  Spread the meat mixture over the cheese. In a mixing bowl, mix together the eggs, flour, milk, and oil and pour over the meat in the pan. Sprinkle the parmesan cheese over the top and bake for 30 minutes.