Heat the oven to 375°F. Cook the tortellini according to the package directions, then drain it.

Stir the marinara, cream, and Italian seasoning together in a large bowl. Add the tortellini and toss gently.

Spread the mixture in a greased 9-by-13-inch baking dish. Sprinkle the mozzarella and Parmesan over the top.

Bake for 20 minutes, until the sauce bubbles and the cheese melts. Let it sit for five minutes so nobody burns their tongue in the usual hurry.