01 - Pat the chicken breasts dry with paper towels. Season both sides evenly with salt and black pepper.
02 - Set a large skillet over medium-high heat. Add the olive oil and 1 tablespoon of butter, allowing the butter to melt and begin foaming.
03 - Place the chicken breasts in the skillet and sear for 5 to 6 minutes per side until a deep golden crust forms and the internal temperature reaches 165°F. Transfer to a plate and tent loosely with foil.
04 - Reduce the heat to medium. Add the remaining 1 tablespoon of butter to the skillet. Sauté the diced shallot and minced garlic for 2 to 3 minutes, stirring frequently, until softened and fragrant.
05 - Lower the heat to medium-low. Add the Boursin cheese and heavy cream to the skillet. Whisk gently until the cheese has fully melted and the sauce is smooth and velvety.
06 - Stir the chopped parsley into the sauce. Return the chicken breasts to the skillet, spooning the sauce generously over the top. Simmer for 2 to 3 minutes until the chicken is heated through.
07 - Arrange the chicken on serving plates, ladle the sauce over each portion, and finish with a sprinkle of fresh parsley or chopped chives. Serve immediately.