01 - Whisk together olive oil, lemon juice, garlic, oregano, paprika, salt, and black pepper in a bowl until thoroughly combined.
02 - Place chicken breasts in a resealable bag or shallow dish. Pour marinade over the chicken, seal, and refrigerate for at least 30 minutes, up to 2 hours for optimal flavor development.
03 - Preheat grill to medium-high heat and lightly oil the grates to prevent sticking.
04 - Remove chicken from marinade and discard excess liquid. Grill chicken for 6-7 minutes per side until internal temperature reaches 165°F and juices run clear.
05 - Let chicken rest for 5 minutes before slicing to retain juices. Garnish with fresh parsley and serve with lemon wedges if desired.