Start by dicing your chicken breasts into bite-sized pieces. Mince the garlic finely and zest your lemon, then squeeze out the juice. Having everything prepped makes the cooking process smooth and enjoyable.
Heat the olive oil in your large skillet over medium-high heat. Add the diced chicken, sprinkle with salt and black pepper, and sauté until the pieces are golden on the outside and cooked through, about 5-7 minutes. Remove the chicken from the skillet and set aside.
In the same skillet, reduce the heat to medium and add the minced garlic. Stir frequently for about 1 minute until fragrant, being careful not to burn it.
Pour the heavy cream into the skillet with the garlic and bring it to a gentle simmer. Stir in the grated Parmesan cheese, lemon juice, lemon zest, and black pepper. Keep stirring until the cheese is melted and the sauce thickens slightly, about 3-5 minutes.
Add the fettuccine pasta directly to the skillet with the sauce, ensuring the pasta is submerged. If the pasta isn’t fully cooked, add a splash of water or broth and cover the skillet to steam until al dente, stirring occasionally. Alternatively, cook the pasta separately according to package instructions and then add it to the sauce.
Return the cooked chicken to the skillet, tossing everything together until the chicken is coated in the creamy lemon pepper Alfredo sauce and the pasta has soaked up all the flavors.
Sprinkle fresh parsley over the top and serve immediately. This dish pairs beautifully with a crisp green salad or steamed veggies.