Top with Cheese: Sprinkle the shredded mozzarella cheese and grated Parmesan cheese on top of the casserole, covering it completely.
Bake in the Oven: Cover the baking dish with foil and bake the casserole in the preheated oven for 25 minutes. Then, remove the foil and bake for an additional 10 minutes or until the cheese is bubbly and golden brown.
Garnish and Serve: Once the casserole is out of the oven, garnish it with chopped fresh parsley for added freshness and flavor.