01 - In a large mixing bowl, whisk together olive oil, lemon juice, minced garlic, dried oregano, smoked paprika, ground cumin, salt, and black pepper until fully combined.
02 - Add chicken pieces to the marinade. Toss thoroughly to coat. Cover and refrigerate for at least 30 minutes, or up to 2 hours to intensify flavor.
03 - Preheat grill or grill pan to medium-high heat. If using wooden skewers, soak in water for 20 minutes to prevent burning.
04 - Alternately thread marinated chicken, red bell pepper, yellow bell pepper, red onion, and zucchini onto skewers for even distribution.
05 - Place skewers on grill and cook for 12 to 15 minutes, turning every 3 to 4 minutes, until chicken is fully cooked and lightly charred at the edges.
06 - Transfer kabobs from grill and allow to rest for 5 minutes. Garnish with chopped parsley and lemon wedges before serving, if desired.