Grilled Chicken Gyros – – Greek-Spiced Chicken: chicken (cooked, cut to bite-sized pieces), olive oil, lemon juice, oregano, garlic powder, onion powder, Gyros: flatbread (or pita), chicken (Greek-spiced ), tomato (sliced into wedges), iceberg lettuce, red onion (thinly sliced), potato (French fried, cooked and golden brown), Tzatziki (see recipe index), In a mixing bowl, combine all Greek-spiced chicken ingredients. Marinate for 30 minutes. ; Heat a heavy skillet on high heat. Add the chicken mixture to the pan. Heat the cooked chicken through and allow the chicken to brown to a crispy outside.; For assembling the gyros, warm the flatbread on a dry skillet. Spoon in chicken, then tomato, lettuce, red onion and French fried potatoes. Top with tzatziki.; – Raw chicken may be used, but allow for extra cooking time.