- Cook the pasta according to package directions until al dente. Drain and set aside. 
- While the pasta cooks, season both sides of the chicken breasts with salt and pepper. 
- Heat olive oil in a grill pan or skillet over medium heat. Grill the chicken for 5–6 minutes on each side until cooked through. Let it rest before slicing. 
- In a separate large skillet, melt the butter over medium heat. Add the garlic and cook for 1–2 minutes until fragrant. 
- Pour in the heavy cream and stir constantly. Let it simmer gently for 3–4 minutes. 
- Whisk in the Parmesan cheese until the sauce is smooth and creamy. 
- Toss in the cooked pasta and sliced grilled chicken. Mix well to coat everything in the Alfredo sauce. 
- Serve warm, topped with parsley if you like.