01 - Bring a large pot of salted water to a boil. Cook cheese tortellini according to package directions, adding broccoli florets for the last 2 minutes of cooking. Drain well and set aside.
02 - Season the chicken pieces evenly with salt and black pepper.
03 - Heat olive oil in a large skillet over medium-high heat. Add chicken and cook, turning occasionally, until golden brown and fully cooked, about 5 to 6 minutes. Transfer chicken to a plate and set aside.
04 - In the same skillet, melt butter over medium heat. Add minced garlic and sauté for 1 minute, stirring frequently until aromatic.
05 - Reduce heat to medium. Pour in the heavy cream, stirring to deglaze the pan. Bring to a gentle simmer. Stir in Parmesan cheese gradually, mixing until cheese is fully melted and sauce begins to thicken, about 2 to 3 minutes.
06 - Add the cooked tortellini, broccoli, and seared chicken to the skillet. Toss gently until all components are coated in the creamy sauce. Stir in crushed red pepper flakes if using.
07 - Taste and adjust seasoning with additional salt and black pepper if needed.
08 - Serve hot, garnished with additional Parmesan cheese and chopped fresh parsley, if desired.