01 - Whisk together the olive oil, lemon juice, garlic, oregano, paprika, salt, and pepper in a large bowl until fully combined.
02 - Add chicken pieces to the marinade, stirring to coat thoroughly. Cover and refrigerate for at least 20 minutes, up to 2 hours for enhanced flavor.
03 - Preheat grill to medium-high heat, approximately 375-400°F.
04 - Thread chicken, bell peppers, onions, zucchini, and mushrooms onto skewers, alternating ingredients for even cooking and visual appeal.
05 - Lightly brush assembled kabobs with any remaining marinade for extra flavor.
06 - Place kabobs on the preheated grill. Turn every 3-4 minutes until chicken reaches an internal temperature of 165°F and vegetables are tender with light char, approximately 12-15 minutes total.
07 - Remove from grill and let rest for 2 minutes to allow juices to redistribute. Garnish with fresh parsley and serve with lemon wedges if desired.