The word souvlaki simply means to cook something on a skewer, something Greek cooks have been doing for thousands of years: cooking skewers were found during excavations on Santorini which date back to the seventeenth century BC. They can be made with pork, beef, lamb, chicken or even vegetables. I love to make them with chicken and plenty of tzatziki and red onion.
When rolling up a wrap, fold the bottom of the flatbread up slightly, to stop the filling falling out, then roll in from the sides.