Method
Preparation
Bring a large pot of salted water to a boil. Add the tortellini and cook according to package directions until al dente. Drain and set aside.
While the pasta cooks, heat the skillet over medium heat and add the butter or olive oil.
Cooking
Add the minced garlic to the skillet and sauté for 30–60 seconds until fragrant, stirring so it doesn't brown.
Add the broccoli florets and cook for 3–5 minutes until bright green and just tender. If using frozen broccoli, cook until heated through.
Stir in the cooked chicken, tossing to combine and warm it through for 2–3 minutes.
Pour in the heavy cream (or milk) and bring to a gentle simmer. Allow it to reduce slightly for 2–3 minutes.
Add the drained tortellini to the skillet and toss everything together so the sauce coats the pasta evenly.
Stir in the grated Parmesan until melted and smooth. If it looks too thick, add 1–2 tablespoons of pasta water to loosen the sauce.
Season with salt, pepper, and red pepper flakes to taste. Finish with a squeeze of lemon or lemon zest if using, and sprinkle chopped parsley on top.
Serve immediately on plates or family-style from the skillet.
Notes
For best texture, freeze cooked chicken and sauces separately; reheat and assemble fresh. You can swap tortellini for any pasta or gnocchi. For a vegetarian version, replace chicken with sautéed mushrooms or extra broccoli.