01 - Season the chicken breasts with salt, pepper, and Italian seasoning on both sides.
02 - Heat olive oil and butter in a large skillet over medium-high heat. Add chicken breasts and cook for 5–7 minutes per side, until golden brown and cooked through. Remove the chicken and set aside.
03 - In the same skillet, reduce heat to medium. Add onion and garlic; sauté for 2–3 minutes until fragrant and translucent.
04 - Pour in the chicken broth, scraping up any browned bits from the pan. Let it simmer for 2 minutes.
05 - Stir in the heavy cream and Parmesan cheese, whisking until the sauce is smooth. Simmer gently for another 2–3 minutes until slightly thickened.
06 - Return the chicken to the skillet, coating it in the sauce. Simmer for 3–5 minutes, allowing the flavors to meld. Sprinkle with fresh parsley and additional Parmesan, if desired. Serve immediately with your choice of sides.