Stuffing: Grate the cheese and sheep cheese, put them in a bowl, cut the onion with scissors, add the diced fillet muscle, add 2 eggs and an egg white, sprinkle with pepper and mix everything.
Assembly: Cut the dough in half and join the two pieces lengthwise, so we can form a long roll that we can place in a spiral. After we have joined the two pieces of dough, we put the filling on the whole length and roll the dough, then we place it in the tray, lined with baking paper, in a spiral shape. Stir in places with a skewer stick and then grease with egg yolk. Put the tray in the preheated oven at 180 degrees for about 20-25 min. Serve both hot and cold. Quick, tastes and satiety.