1. Preheat grill to medium-high. Oil the grates.
2. Whisk olive oil, orange juice, lime juice, garlic, salt, and pepper.
3. Coat chicken with the marinade. (Optional: marinate 15–30 minutes for more flavor.)
4. Grill 5–6 minutes per side, until fully cooked.
5. Rest 5 minutes before slicing. Top with cilantro if using.
Food Safety Reminder: Chicken is fully cooked when the thickest part reaches an internal temperature of 165°F. Always use a meat thermometer to confirm doneness before serving.