Begin by washing and cutting the chicken breast into even-sized cubes. Aim for pieces that are not too small so they remain juicy when grilled.
Wash and slice the bell peppers, zucchini, and red onion into similar-sized pieces.
In a mixing bowl, whisk together olive oil, lemon juice, garlic powder, salt, and black pepper. This will serve as your marinade.
Add the chicken pieces to the marinade, ensuring each piece is well-coated. Allow this to marinate for at least 10 minutes.
While the chicken is marinating, start preheating your grill to a medium-high heat.
Thread chicken, bell peppers, zucchini, cherry tomatoes, and red onion alternately onto skewers. If using wooden skewers, ensure they’re soaked in water for at least 30 minutes prior to prevent burning.
Place the skewers on the grill and let them cook for 7 minutes on each side or until the chicken is cooked through and the veggies are slightly charred.
Once done, remove the Grilled Chicken and Veggie Skewers from the grill and let them rest for a couple of minutes. Garnish with chopped parsley if desired.