Start by mixing marinade ingredients in a plastic (Ziploc) bag or salad bowl.
Place the chicken Add the chicken. Mix well with your hands so that the chicken is covered with the marinade.
Leave to marinate overnight or for a few hours.
Mix the ingredients in the yogurt sauce in a bowl, place in the refrigerator until ready to serve.
Heat the BBQ or a large grill pan. Cook the chicken until golden brown on both sides like 4 - 6 minutes for each side.
Place on a large plate and cover with aluminum foil to keep them warm.
Serve with Pita bread, yogurt sauce and salad (lettuce, tomatoes, red onion, sumac).