1 lb frozen meatballs 2 cups marinara sauce 1 cup shredded mozzarella cheese ½ cup grated Parmesan cheese 1 tsp Italian seasoning 1 tbsp olive oil Fresh basil (optional, for garnish)
Preheat your oven to 375°F. Lightly grease a casserole dish with olive oil to prevent sticking and ensure easy serving after baking.
Place the frozen meatballs in a single layer inside the casserole dish, leaving a little space between each meatball for even cooking.
Pour the marinara sauce evenly over the meatballs, making sure all are well coated with sauce to keep them moist and flavorful.
Sprinkle the shredded mozzarella cheese generously over the saucy meatballs, spreading it out to cover as much surface area as possible.
Add the grated Parmesan cheese on top of the mozzarella layer for an extra cheesy, rich flavor that melts perfectly during baking.
Sprinkle Italian seasoning evenly over the cheese to infuse the casserole with classic herb flavors that pair beautifully with the meatballs.
Bake uncovered for 25–30 minutes until cheese is melted and bubbly; garnish with fresh basil before serving for a pop of color and freshness.