For best results, marinate the chicken and vegetables for at least 30 minutes, or up to 2 hours, in the refrigerator before grilling. This will allow the flavors to meld and the chicken to become more tender. Feel free to experiment with different vegetables! Bell peppers of different colors, mushrooms, or asparagus would all be delicious additions. If you don't have a grill, you can also cook the chicken and vegetables in a grill pan on the stovetop or roast them in the oven at 400°F (200°C) until tender. To add a touch of brightness, squeeze fresh lemon juice over the grilled chicken and vegetables before serving. Consider adding a sprinkle of red pepper flakes for a little heat.