In a bowl, whisk together olive oil, lemon juice, lemon zest, garlic, rosemary, thyme, salt, and pepper.

Place chicken in a resealable bag or shallow dish and pour marinade over it. Refrigerate for at least 30 minutes or up to 4 hours.

Preheat grill to medium-high heat.

Remove chicken from marinade and grill for 5–7 minutes per side, or until cooked through and juices run clear.

Let rest a few minutes before serving. Garnish with lemon slices and fresh herbs if desired.