
Add the chicken, oil, lemon juice, garlic, oregano, parsley, salt, and pepper to a large mixing bowl. Stir together. Place the bowl in the refrigerator and marinate for at least 30 minutes.
Heat the grill on medium-high heat. Then thread the marinated chicken pieces onto skewers (about 8 to 9 pieces per skewer makes 6 skewers).
Cook the skewers on the grill for 3 to 4 minutes on each side.
Served the grilled chicken souvlaki with the tzatziki sauce.