Cook the fettuccine pasta according to package instructions, then drain and set aside.
In a large skillet, heat olive oil over medium heat.
Add diced chicken breast to the skillet, seasoning with salt and pepper.
Cook chicken until golden brown and fully cooked, about 5-7 minutes.
Stir in minced garlic and sauté for 1-2 minutes until fragrant.
Pour in heavy cream, stirring to combine with chicken and garlic.
Gradually add grated parmesan cheese, mixing until melted and smooth.
Combine the cooked pasta with the sauce, tossing to coat evenly.
Adjust seasoning with salt and pepper as needed.
Garnish with fresh parsley before serving.