Cook the fettuccine according to package instructions.
Heat olive oil in a large skillet over medium heat.
Season the chicken breasts with salt and pepper, then add them to the skillet.
Cook the chicken for about 5-7 minutes on each side until cooked through, then remove from the skillet and let rest.
In the same skillet, add minced garlic and sauté for about 1 minute until fragrant.
Pour in the heavy cream and bring to a simmer, stirring frequently.
Add the grated Parmesan cheese, stirring until melted and the sauce is creamy.
Slice the cooked chicken and return it to the sauce, allowing it to coat evenly.
Toss the drained fettuccine with the sauce until coated.
Serve the pasta garnished with fresh parsley.