Season the chicken. Slice your chicken breasts thin, coat with Italian seasoning, salt, and pepper on both sides.
Cook the chicken. Heat olive oil in a large pan over medium-high heat. Sear the chicken 4–5 minutes per side until golden and cooked through. Set aside and slice into strips.
Boil the pasta. While the chicken cooks, bring salted water to a boil and cook pasta until al dente. Reserve ½ cup of pasta water before draining.
Make the sauce. In the same pan, melt butter over medium heat. Add minced garlic and sauté for 60 seconds — don’t let it burn.
Add the cream. Pour in heavy cream, stir well, and let it simmer gently for 3–4 minutes until slightly thickened.
Melt in the Parmesan. Add grated Parmesan and stir until fully melted and smooth. Add a splash of pasta water if the sauce feels too thick.
Combine everything. Add the drained pasta and sliced chicken to the sauce. Toss well to coat every piece.
Taste and adjust. Season with more salt, pepper, or chili flakes if needed. Garnish with fresh parsley and extra Parmesan.