Crepes Nalesniki

Whisk the egg and egg yolk together. Pour in half the milk and whisk again. Mix the flour and the remaining milk. Beat well until batter is smooth. Add a pinch of salt. Leave it for 5 minutes. Heat oil in a pan, pour a little of the batter onto it. Tilt the pan so that the batter runs to fill it and forms a very thin pancake. When browned, turn on the other side. Fill the pancakes with cheese, roll them, or fold into quarters and serve warm. For the filling: press curd cheese through a sieve. Cream butter with egg yolk and mix with the cheese. Add sugar.