Cook the fettuccine pasta according to package instructions.
In a large skillet, heat olive oil over medium heat.
Add the diced chicken to the skillet and season with salt and black pepper.
Cook the chicken for 6-8 minutes or until it's no longer pink.
Add minced garlic and sauté for about 1 minute or until fragrant.
Pour in the heavy cream and bring the mixture to a gentle simmer.
Stir in the grated Parmesan cheese until it's melted and combined.
Combine the cooked fettuccine pasta with the sauce, adding reserved pasta water as needed.
Taste and adjust seasoning with salt and pepper, if necessary.
Serve hot, garnished with chopped parsley.
