Preheat the oven in high heat (200-220°C), with extra heat on the oven elements. Place the baking sheet on the bottom rack to heat it well, for the peinirli to bake properly.
Form the dough in a boat shape.
Fill each peinirli with ham and plenty of mozzarella. You can add whatever you like to the stuffing, such as tomato, pastourma, ham or egg. Place the stuffed peinirli on the hot baking sheet. Bake on the bottom rack for approx. 15, until golden brown.
Take them out of the oven, smear them with good quality melted butter while still hot, so as to be shiny, and serve.