Preheat oven to 350 degrees.

Cook tortellini according to package and drain.

In the same pot to cooked the tortellini in, combine the marinara sauce with the pesto. Add in the tortellini and toss to coat.

Pour into a 11 x 7 inch baking dish.

Top with the mozzarella and Parmesan and cover loosely with foil.

Bake at 350 for 20 minutes, the remove foil and bake another 5 minutes or until cheese is bubbly. Serves 4-6.