Begin by seasoning both sides of the chicken breasts generously with salt and pepper, ensuring they are well-coated.
In a large skillet, heat the olive oil over medium-high heat until shimmering. Carefully add the seasoned chicken breasts and sear them for about 5-7 minutes on each side, or until they are thoroughly cooked and golden brown. Once cooked, remove the chicken from the skillet and set aside on a plate.
In the same skillet (do not wash it!), add the minced garlic and sauté for about 1 minute, stirring constantly until it becomes fragrant but not burnt.
Lower the heat to medium, then slowly pour in the heavy cream. Stir continuously, allowing it to come to a gentle simmer.
Gradually sprinkle in the grated Parmesan cheese, whisking until the sauce is creamy and smooth, making sure it thickens nicely.
Add in the Italian seasoning along with the crushed red pepper flakes (if you like a bit of heat), mixing well to incorporate.
While preparing the sauce, cook the fettuccine pasta according to the package instructions in a separate pot, until al dente. Once done, drain it and set aside.
Slice the cooked chicken into medium strips. Return the chicken to the skillet with the creamy Alfredo sauce, allowing it to simmer for an additional couple of minutes to reheat.
Gently toss the cooked fettuccine in the skillet with the chicken and sauce, ensuring that all the pasta is thoroughly coated.
Serve your dish hot, garnished with a sprinkle of freshly chopped parsley to add a pop of color and freshness.
Notes
Consider plating the pasta in a shallow bowl, twirling the fettuccine into a nest shape for an elegant presentation.