Heat olive oil in a pan over medium heat and add the diced chicken breast.
Add minced garlic to the pan and sauté for about 1 minute until fragrant.
Stir in the broccoli florets and cook for 3-4 minutes until slightly tender.
Prepare the tortellini according to the package instructions; drain and set aside.
Pour in the heavy cream and bring to a simmer, stirring continuously.
Add the mozzarella and Parmesan cheese, stirring until melted and combined.
Mix in the cooked tortellini and broccoli into the sauce, stirring gently to coat.
Season with salt and pepper to taste before serving.