Ensure the dough is fully cold. Dust your work surface and the dough with flour.
Roll out the dough until it is about a quarter of an inch or half a centimeter thick, maintaining a rectangular shape.
Spread the filling evenly over the dough, extending it to the edges. Optionally, sprinkle grated cheese over the filling.
Starting from the top edge, fold the dough over and slightly stretch as you roll it down.
Roll the dough evenly to even out the thickness.
Cut the rolled dough in half, then cut each half in half again, repeating until you have eight pieces.
Grease a 9-inch pie plate (or use a cake tin or casserole dish) generously with oil. Place the rolls in the dish, pressing them down slightly if they are tall.
Cover the rolls lightly with the plastic wrap you used to wrap the dough, allowing room for them to rise.
Leave the rolls to proof for an hour or until doubled in size.
Preheat the oven to 375°F/190°C.
Once the rolls have doubled in size and are puffy, brush them with beaten egg.
Bake the rolls in the preheated oven for approximately 30 to 35 minutes, or until they turn golden brown.