Pat the chicken dry and season with Italian seasoning, garlic powder, salt, and black pepper.
Heat olive oil in a large skillet over medium heat until shimmering.
Add chicken and cook for 6–7 minutes per side until golden and the internal temperature reads 165°F (75°C).
Transfer chicken to a plate, rest for 5 minutes, then slice thinly across the grain.
Cooking Pasta
Bring a large pot of water to a boil, add salt, and cook the fettuccine or linguine according to package directions (about 9–10 minutes) until al dente.
Reserve 1 cup of pasta water, then drain the pasta.
Making the Sauce
In the same skillet, melt the butter over medium heat.
Add minced garlic and cook for 1–2 minutes until fragrant, but do not brown it.
Pour in the heavy cream and bring to a gentle simmer.
Stir in Italian seasoning, salt, and black pepper, allowing to simmer for 4–5 minutes to thicken slightly.
Reduce heat to low and gradually add the grated Parmesan, stirring constantly until the sauce is smooth.
Combining and Serving
Add the cooked pasta to the skillet and toss to coat, adding reserved pasta water as needed for consistency.
Top with sliced chicken, toss gently, and serve immediately garnished with parsley and extra Parmesan.
Notes
For variations, try adding spinach or using different proteins. Keep leftover sauce refrigerated and reheat gently to preserve texture.