01 - Bring a large pot of salted water to a boil. Cook the fettuccine according to package instructions until al dente. Reserve 1/2 cup of pasta water, then drain and set aside.
02 - Season the chicken strips evenly with salt and ground black pepper.
03 - Heat olive oil in a large skillet over medium-high heat. Add the chicken strips and sauté for 5 to 7 minutes, turning occasionally, until golden brown and cooked through. Remove chicken from skillet and set aside.
04 - In the same skillet, melt unsalted butter over medium heat. Add the minced garlic and cook for about 1 minute until fragrant without browning.
05 - Pour in heavy cream and bring to a gentle simmer. Gradually whisk in the grated Parmesan cheese until fully melted and the sauce is smooth. Stir in ground nutmeg if using.
06 - Adjust seasoning by adding salt and ground black pepper to taste.
07 - Return the cooked chicken to the skillet and toss to coat thoroughly with the Alfredo sauce.
08 - Incorporate the drained fettuccine into the skillet, tossing everything together. Add reserved pasta water gradually if the sauce requires thinning to achieve desired consistency.
09 - Plate immediately, garnished with chopped fresh parsley and additional grated Parmesan cheese.