Tastes great. It's the perfect weeknight meal!
Save out 1/4 cup of the Parmesan cheese and 1/4 cup shredded mozzarella cheese. Set aside.
Mix together green onions, garlic, chopped parsley, 1/2 cup Parmesan cheese, ricotta cheese, egg, butter(if using), salt, Italian seasoning, and 3/4 cup mozzarella cheese.
Mix cheese/egg mixture with cooked spaghetti and place it on the bottom of a shallow casserole dish.
In a bowl, mix spaghetti sauce with tomatoes. Pour over spaghetti mixture.
Sprinkle with remaining 1/4 cup Parmesan cheese and 1/4 cup mozzarella cheese that was set aside.
Bake about 30 minutes at 350 degrees. After pulling out of the oven, garnish the pie with chopped parsley. The pie will feel firm to the touch.