01 - Bring a large pot of salted water to a boil. Add tortellini and cook according to package directions, introducing broccoli florets for the final 2 minutes. Drain thoroughly and reserve.
02 - Lightly season chicken pieces with salt and black pepper.
03 - In a large skillet, heat olive oil over medium-high heat. Add chicken and cook until fully browned and cooked through, about 5–6 minutes. Transfer to a plate and keep warm.
04 - In the same skillet, add butter and melt over medium heat. Sauté garlic for 1 minute until aromatic.
05 - Reduce heat to medium and add heavy cream, stirring gently. Heat until simmering, then sprinkle in Parmesan and stir continuously until sauce is smooth and slightly thickened, 2–3 minutes.
06 - Add cooked tortellini, broccoli, and sautéed chicken to the skillet. Toss thoroughly to coat in the cream sauce. Stir in crushed red pepper flakes if using.
07 - Taste and adjust with additional salt and black pepper as needed.
08 - Serve immediately, finished with extra Parmesan and fresh chopped parsley to taste.