Dough: Knead the ingredients to make a soft dough. Cover with cotton towel and let rest for half an hour. Filling: Mix all the ingredients well in a large bowl and set aside. Roll out the dough and cut into small squares/circles, with a small plate or large glass, depending on desired size of the “kaltsounia (sweet cheese pastry). Place one spoonful of filling in the center of each. Pinch the dough all around with thumb and index finger to close. Place on non stick baking paper in a baking pan and coat with egg yolk.