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