01 - In a mixing bowl, whisk together the olive oil, lemon juice, minced garlic, dried oregano, smoked paprika, salt, and black pepper 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 thoroughly coated. Seal and refrigerate for a minimum of 30 minutes, or up to 4 hours for optimal flavor penetration.
03 - Preheat an outdoor grill or grill pan to medium-high heat. Lightly oil the grates to prevent the chicken from sticking.
04 - Remove the chicken from the marinade, allowing any excess to drip off. Place the breasts onto the hot grill and cook for 6 to 7 minutes per side, until the internal temperature registers 165°F on a meat thermometer and the juices run clear.
05 - Transfer the grilled chicken to a cutting board and let it rest for 5 minutes before slicing to allow the juices to redistribute throughout the meat.
06 - Arrange the sliced chicken on a serving platter and garnish with chopped fresh parsley and lemon wedges if desired.