These grilled chicken and vegetable kabobs are a colorful and healthy meal option. To make the marinade, combine garlic, lemon juice, oregano, salt, and olive oil in a food processor. Pulse until smooth, then pour over the chicken and let it marinate for at least 30 minutes. Thread the chicken and vegetables onto skewers, alternating between chicken, bell peppers, onions, and zucchini. Grill for 10-12 minutes, turning occasionally, until the chicken is cooked through and the vegetables are tender. Serve with a side of rice or quinoa.