Cook the fettuccine according to package instructions. Drain well and set aside.
Heat olive oil in a large skillet over medium heat. Add sliced chicken and cook for 6 to 8 minutes until golden and fully cooked. Remove and set aside.
In the same skillet, add broccoli florets with a splash of water. Cover and steam for 3 to 4 minutes until tender. Remove and keep warm.
Melt butter in the skillet over medium heat. Add minced garlic and cook for about a minute until fragrant.
Pour in the heavy cream and bring to a gentle simmer. Stir constantly for 3 to 4 minutes until slightly thickened.
Stir in grated Parmesan cheese until smooth and creamy. Season with salt and pepper to taste.
Add the cooked chicken and broccoli back into the skillet. Mix well to coat everything with the sauce.
Add the cooked fettuccine to the skillet. Toss everything to combine and warm through.
Serve hot and enjoy your creamy chicken broccoli alfredo.
Notes
Store leftovers in an airtight container in the fridge for up to 3 days. Reheat with a splash of cream or milk to restore sauce consistency.