In a medium bowl add yogurt, lemon juice and seasonings. Mix well.
Add cubed chicken to the bowl and use a rubber spatula to coat chicken with yogurt mixture. Cover and marinate in the refrigerator 20 minutes.
Heat outdoor grill to medium hight heat.
Remove chicken from refrigerator and thread on skewers. Coat grates with olive oil or cooking spray and add skewers to the grill. Close lid. Let cook for 5 minutes then flip skewer. Cook 5 minutes more and remove.
Let cool until slightly until able to handle. Use a fork to remove chicken from skewer and serve with vegetables.