01 - Pat chicken breasts dry with paper towels. Season both sides generously with salt and black pepper.
02 - Heat olive oil and butter in large skillet over medium-high heat. Add chicken and sear 4–5 minutes per side until golden brown and nearly cooked through. Transfer to plate and set aside.
03 - Reduce heat to medium. Add minced garlic to skillet and sauté 30 seconds until fragrant, being careful not to burn.
04 - Add Boursin cheese, chicken broth, and heavy cream to skillet. Stir constantly until cheese melts completely and sauce becomes smooth and creamy.
05 - Stir in fresh parsley and dried thyme if using. Allow herbs to infuse into sauce for 1 minute.
06 - Return chicken breasts to skillet. Simmer 7–10 minutes, turning occasionally, until chicken reaches internal temperature of 165°F and sauce has thickened to coating consistency.
07 - Taste sauce and adjust salt and pepper as needed. Transfer to serving platter and garnish with additional fresh parsley.