Step 1: Preheat the Oven

Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish.

Step 2: Prepare the Ravioli

1. If using uncooked ravioli, follow package instructions to boil until al dente. Drain and set aside.
2. If using pre-cooked ravioli, skip this step.

Step 3: Assemble the Casserole

1. Spread a thin layer of marinara sauce on the bottom of the prepared baking dish to prevent sticking.