Prep Time: 15 minutes
Cook Time: 25 minutes
Melt butter in medium saucepan over medium heat. Add flour; cook 2 minutes, stirring constantly, until bubbly. Add milk and broth; cook until thickened, stirring constantly. Stir in pesto, salt and pepper. Heat through; set aside.
Layer half of the tortellini in 1-1/2-quart baking dish; sprinkle with half of the tomatoes. Pour half of sauce over tortellini; sprinkle with half of the Mozzarella cheese. Top with remaining tortellini, tomatoes, sauce and Mozzarella cheese. Bake in preheated 350°F oven 25 minutes until bubbly. Sprinkle with Parmesan cheese.