In a bowl put the sifted flour, sugar and chilled and sliced butter.
Hands bring to the state of crumbs.
Add egg, cold water, knead the dough.
Collect the dough into a ball.
Roll out the dough into a thin layer 3 mm thick.
For the filling, combine cane sugar, black currant, starch. Stir.
Put the dough layer on a greased with oil in a round shape, put the filling in the center, leaving the edges free.
The edges of the biscuits collapse on the cake.
Beat the yolk, spread it over the pie.
Bake a galette in a preheated 180 degrees in the oven for 35 minutes.