Preheat oven to 350°F. Coat a 9x13 baking dish with cooking spray.
2
In a medium saucepan, combine pesto, heavy cream, salt and black pepper. Cook over medium heat until just boiling.
3
Spread half of tortellini and half of the cherry tomatoes in the bottom of the prepared baking dish. Pour half of the pesto mixture over top and toss gently. Spread half of the Parmesan and mozzarella cheese over top.
4
Repeat step 3 with remaining tortellini, tomatoes, pesto mixture and cheeses.
5
Cover dish with foil and bake for 20 minutes. Remove foil and return to oven for an additional 10 minutes or until slightly browned and bubbly. Garnish with basil and serve.
