Turkish Pasties with Yoghurt Pastry

These are not in fact a traditional dish, though Turkey has many good little pies to offer. The delicious yoghurt pastry came from some Turkish friends of mine in Istanbul and the filling, which is full of flavour, contains two of my favourite vegetables — potato and leek. Being small, the pies are ideal to take on picnics, still warm if possible. They can be made ahead and reheated.