Cook the cheese tortellini according to package instructions; drain and set aside.
In a large mixing bowl, combine the heavy cream, pesto, garlic, Italian seasoning, salt, and pepper. Whisk until the mixture is well combined and creamy.
Add the cooked tortellini and cherry tomatoes to the bowl, gently folding them into the creamy pesto mixture until evenly coated.
Transfer the tortellini mixture to a greased 9x13 inch baking dish.
Sprinkle the shredded mozzarella and grated Parmesan cheese evenly over the top.
Bake in the preheated oven for 20-25 minutes or until the cheese is bubbly and golden brown.
Remove from the oven and let it cool for a few minutes before serving.
Garnish with fresh basil leaves for added flavor and color.
Notes
Feel free to add vegetables or protein for a heartier meal.