01 - Whisk together Greek yogurt, olive oil, garlic, lemon zest, lemon juice, oregano, cumin, paprika, salt, and black pepper in a large bowl until thoroughly combined.
02 - Add chicken pieces to the bowl and toss until evenly coated. Cover and refrigerate for at least 1 hour, or up to 8 hours for deeper flavor penetration.
03 - If using wooden skewers, soak them in water for 30 minutes prior to grilling to prevent burning.
04 - Thread marinated chicken pieces onto skewers, leaving small gaps between pieces to ensure even heat circulation and cooking.
05 - Heat grill or grill pan over medium-high temperature. Lightly oil the grates to prevent sticking.
06 - Cook skewers for 5 to 7 minutes per side until chicken reaches an internal temperature of 165°F and develops desirable char marks.
07 - Transfer to serving platter and accompany with fresh lemon wedges and chopped parsley if desired.