01 - Combine olive oil, lemon juice, lemon zest, minced garlic, thyme, salt, and black pepper in a medium mixing bowl; whisk thoroughly.
02 - Place chicken breasts in a resealable plastic bag or shallow dish, pour marinade over, ensuring full coating. Refrigerate for a minimum of 20 minutes up to 2 hours for enhanced flavor.
03 - Preheat a large skillet over medium-high heat.
04 - Remove chicken from marinade, shaking off excess. Add a small amount of olive oil to the skillet; sear chicken breasts for 5 to 6 minutes per side until golden brown and internal temperature reaches 74°C (165°F).
05 - Transfer chicken to a plate, let rest for 2 to 3 minutes. Slice and present garnished with lemon slices and fresh thyme sprigs.