In a large pot of salted boiling water, cook the fettuccine according to package instructions until al dente. Reserve about half a cup of pasta water, then drain the pasta and set aside.
While the pasta is cooking, season the chicken breasts with salt, pepper, and Italian seasoning.
In a large skillet, heat the olive oil over medium-high heat. Add the seasoned chicken breasts and cook for about 6-7 minutes on each side, or until the chicken is cooked through and no longer pink in the center. Remove from the skillet and let it rest before slicing it into thin strips.
In the same skillet, reduce the heat to medium and add the minced garlic. Sauté for about 30 seconds until fragrant. Be careful not to burn it.
Pour in the heavy cream, stirring constantly. Gradually whisk in the grated Parmesan cheese until melted and smooth. If the sauce is too thick, add a bit of the reserved pasta water to reach your desired consistency.
Add the cooked fettuccine and sliced chicken to the sauce, tossing to coat evenly. Heat everything together for a minute if necessary, and season with additional salt and pepper to taste.
Transfer the creamy fettuccine Alfredo to plates or a large serving bowl.
Notes
Garnish with freshly chopped parsley and an extra sprinkle of Parmesan cheese for an elegant touch.