01 - Fill a large pot with salted water and bring to a boil. Cook tortellini according to package instructions, adding broccoli florets during the last 2 minutes. Drain thoroughly and set aside.
02 - Pat chicken pieces dry and season evenly with salt and pepper.
03 - Heat olive oil in a large skillet over medium-high heat. Add chicken and sauté until golden and cooked through, about 5 to 6 minutes. Remove chicken and set aside.
04 - Reduce heat to medium. In the same skillet, melt butter. Add minced garlic and sauté for 1 minute until aromatic.
05 - Pour in heavy cream, stirring to deglaze the pan. Bring to a gentle simmer, then add Parmesan cheese. Stir constantly until cheese is melted and sauce is thickened, about 2 to 3 minutes.
06 - Return cooked tortellini, broccoli, and chicken to the skillet. Gently toss to coat all ingredients evenly in the sauce. Stir in crushed red pepper flakes, if desired.
07 - Taste and adjust with additional salt and black pepper as needed.
08 - Transfer to plates and serve hot, garnished with extra Parmesan and fresh parsley, if desired.