01 - Bring a large pot of salted water to a boil. Cook tortellini according to package directions, adding broccoli florets in the last 2 minutes. Drain thoroughly and set aside.
02 - Season chicken pieces evenly 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, 5 to 6 minutes. Remove chicken and set aside.
04 - In the same skillet, melt unsalted butter. Add minced garlic and sauté for 1 minute until fragrant.
05 - Reduce heat to medium. Pour in heavy cream while stirring. Bring to a gentle simmer, then add grated Parmesan cheese. Stir continuously until cheese is fully melted and sauce thickens, about 2 to 3 minutes.
06 - Return cooked tortellini, broccoli, and chicken to skillet. Toss thoroughly to ensure all ingredients are coated in the creamy sauce. Stir in crushed red pepper flakes if desired.
07 - Taste and adjust seasoning with additional salt and black pepper as necessary.
08 - Serve immediately, garnished with additional Parmesan cheese and fresh parsley if preferred.