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, turning each piece to ensure even coating. Refrigerate for at least 30 minutes, or up to 4 hours for maximum 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 on the hot grill and cook for 6 to 7 minutes per side, until the internal temperature reaches 165°F (74°C) and the juices run clear.
05 - Transfer the grilled chicken to a cutting board and let it rest for 5 minutes to allow the juices to redistribute before slicing.
06 - Slice the chicken and arrange on a serving platter. Garnish with chopped fresh parsley and lemon wedges if desired. Serve alongside grilled vegetables, a fresh salad, or steamed rice.