Use fresh grated cheese rather than pre-shredded for better melt and flavor., Frozen ravioli should be thawed or parboiled briefly to ensure even cooking., Choose a thick marinara sauce to avoid sogginess., Keep ravioli fully covered with sauce to prevent drying out., The dish can be made ahead and refrigerated up to 24 hours before baking., Freeze assembled but unbaked casserole up to 2 months; bake covered from frozen with adjusted times., Add proteins like cooked ground beef, sausage, or shredded chicken into the sauce for a heartier meal., Add sautéed vegetables (mushrooms, zucchini, spinach, peppers) for a veg-forward version., For a crunchy topping, sprinkle panko breadcrumbs mixed with olive oil and Parmesan before final bake., Use gluten-free ravioli and marinara to make the dish gluten-free., Substitute cheeses such as provolone or fontina for variation., To reheat leftovers, microwave individual portions or bake covered at 350°F for 15–20 minutes.