01 - Heat olive oil and butter in a large skillet over medium heat. Season chicken breasts with salt and pepper on both sides, then place in the pan. Sear for 3–4 minutes per side until a golden-brown crust forms. Remove the chicken and set aside on a plate.
02 - In the same skillet, add the chopped onion and cook for 2–3 minutes until softened and translucent. Add the minced garlic and sauté for 1 additional minute until fragrant.
03 - Stir the cream cheese, milk, and Parmesan into the skillet. Whisk continuously until a smooth, creamy sauce forms. Mix in the dried Italian herbs and season to taste.
04 - Return the seared chicken breasts to the pan, spooning the sauce over each piece. Reduce heat to low, cover with a lid, and simmer gently for 15–18 minutes, or until the chicken reaches an internal temperature of 165°F and is cooked through.
05 - Remove from heat and sprinkle generously with fresh chives or parsley before serving. Spoon additional sauce from the pan over each portion.