01 - In a large mixing bowl, whisk together the olive oil, lemon juice, minced garlic, dried oregano, smoked paprika, salt, and black pepper until well combined.
02 - Add the chicken pieces to the marinade and toss thoroughly to coat evenly. Cover the bowl and refrigerate for at least 15 minutes, or up to 2 hours for deeper flavor penetration.
03 - Preheat your grill to medium-high heat, targeting approximately 400°F. Clean and lightly oil the grates to prevent sticking.
04 - Thread the marinated chicken pieces alternately with red bell pepper, yellow bell pepper, red onion wedges, and zucchini rounds onto metal skewers or wooden skewers that have been soaked in water for at least 30 minutes.
05 - Place the assembled skewers on the preheated grill. Cook for 12 to 15 minutes, turning every 3 to 4 minutes, until the chicken is cooked through to an internal temperature of 165°F and the vegetables are lightly charred with grill marks.
06 - Remove the kabobs from the grill and let them rest for 3 to 5 minutes to allow the juices to redistribute. Serve hot alongside rice, salad, or flatbread.