Process the dough ingredients into a smooth dough. Let rise for 30 minutes.
In the meantime, finely chop the onions and garlic and sauté in butter. Add parsley, mashed sheep`s cheese, yoghurt and egg yolk and season well.
Roll out the dough thinly and cut into 12 squares (10 x 10 cm). Spread the filling on top, brush the edges with whisked egg white and fold up. Brush bags with egg yolks whisked in water. Let rise for 20 minutes.
Bake in a preheated oven at 200 ° C for about 20 minutes. Serve hot.