01 - In a medium bowl, whisk together the olive oil, lemon juice, minced garlic, oregano, paprika, salt, black pepper, and chili flakes until well combined.
02 - Place the chicken breasts in a large resealable plastic bag or shallow dish. Pour the marinade over the chicken, ensuring each piece is evenly coated on all sides.
03 - Seal the bag or cover the dish and refrigerate for at least 30 minutes, or up to 4 hours for more pronounced flavor.
04 - Preheat the grill to medium-high heat (approximately 375–400°F). Lightly oil the grates to prevent the chicken from sticking.
05 - Remove the chicken from the marinade, allowing any excess to drip off. Discard the remaining marinade. Place the chicken on the grill and cook for 6–8 minutes per side, or until the internal temperature reaches 165°F (74°C) and the juices run clear.
06 - Transfer the grilled chicken to a plate and tent loosely with aluminum foil. Allow it to rest for 5 minutes so the juices redistribute throughout the meat.
07 - Sprinkle with chopped fresh parsley and serve alongside lemon wedges.