01 - Bring a large pot of salted water to a boil. Cook tortellini according to package directions, adding broccoli florets during the last 2 minutes of cooking. Drain thoroughly and set aside.
02 - Pat chicken pieces dry with paper towels, then season generously with salt and black 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. Transfer chicken to a clean plate and reserve.
04 - In the same skillet, melt butter over medium heat. Add minced garlic and cook, stirring often, until fragrant, about 1 minute.
05 - Lower the heat to medium. Slowly pour in the heavy cream, stirring to incorporate. Bring to a gentle simmer, then sprinkle in Parmesan cheese. Stir continually until cheese melts and sauce has thickened, about 2 to 3 minutes.
06 - Add the drained tortellini, broccoli, and cooked chicken to the skillet. Toss gently to coat all ingredients with the creamy sauce. Stir in crushed red pepper flakes, if desired.
07 - Taste and adjust seasoning with additional salt and black pepper as needed. Remove from heat.
08 - Serve immediately, garnished with extra Parmesan cheese and chopped fresh parsley if desired.