01 - Whisk together olive oil, lemon juice, lemon zest, minced garlic, thyme, salt, and pepper in a medium bowl.
02 - Place chicken breasts in a large resealable bag or shallow dish. Pour marinade over chicken and coat evenly. Refrigerate for at least 20 minutes, up to 2 hours for enhanced flavor.
03 - Preheat a large skillet over medium-high heat. Remove chicken from marinade, shaking off excess.
04 - Add a small amount of olive oil to the pan. Sear chicken breasts for 5 to 6 minutes per side until golden and fully cooked (internal temperature 165°F).
05 - Remove from heat and let rest for 2 to 3 minutes. Slice and serve garnished with lemon slices and fresh thyme.