01 - In a large 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 ensure even coating. Cover the bowl and refrigerate for at least 15 minutes, or up to 2 hours for more pronounced flavor.
03 - Preheat your grill to medium-high heat, targeting approximately 400°F. If using wooden skewers, soak them in water for at least 30 minutes to prevent burning.
04 - Thread the marinated chicken pieces onto skewers, alternating with red bell pepper, yellow bell pepper, red onion wedges, and zucchini rounds. Distribute ingredients evenly across skewers.
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 develop light charring.
06 - Remove the kabobs from the grill and let them rest for 3 to 5 minutes before serving to allow the juices to redistribute. Serve hot.