01 - Whisk together olive oil, lemon juice, garlic, oregano, paprika, salt, and black pepper in a bowl until well combined.
02 - Place chicken breasts in a resealable bag or shallow dish. Pour marinade over chicken, seal, and refrigerate for at least 30 minutes, up to 2 hours for optimal flavor absorption.
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 for 6-7 minutes per side until internal temperature reaches 165°F and juices run clear.
05 - Transfer chicken to a cutting board and let rest for 5 minutes to allow juices to redistribute before slicing.
06 - Garnish with fresh chopped parsley and serve with lemon wedges if desired.