Steps
1. In a bowl, mix olive oil, lemon juice, oregano, garlic powder, salt, and pepper.
2. Place the chicken breast in the marinade, ensuring it is well-coated. Let it marinate for at least 30 minutes.
3. Preheat the grill or a grill pan over medium-high heat.
4. Grill the chicken for about 6-7 minutes on each side, or until fully cooked through and juices run clear.
5. Remove from the grill and let it rest for 5 minutes before slicing.
6. Garnish with fresh parsley and serve.