Stir in the grated Parmesan cheese, Italian seasoning, and red pepper flakes if using. Cook until the sauce thickens, about 3-4 minutes.
Return the chicken breasts to the skillet, spooning the creamy sauce over them. Cook for an additional 2-3 minutes to heat through.
Garnish with fresh parsley before serving.
Prep Time: 10 minutes | Cooking Time: 20 minutes | Total Time: 30 minutes
Kcal: 450 kcal | Servings: 4 servings
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