Step 1

Preheat the oven to 425°F. Spray a 9x13-inch baking dish with nonstick cooking spray. Set aside.

Step 2

Bring a large pot of salted water to a boil. Once it has reached a boil, add the tortellini. Cook according to package directions until tender, typically 7-9 minutes.

Step 3

Drain the tortellini in a sieve or colander and return them to the pot. Add the marinara sauce and Parmesan cheese and stir to combine.

Step 4

Pour the tortellini mixture into the prepared baking dish. Sprinkle the shredded mozzarella cheese evenly over top.

Step 5

Bake the tortellini on middle rack of oven until cheese is melted and dish gently bubbles at edges, 11-13 minutes.

Step 6

Check to see that tortellini are done. Remove from oven or add time as needed.

Step 7

Allow to rest for 10 minutes before serving.