Sift the flour into a bowl. Gently heat the milk. Crumble the yeast, mix with a pinch of sugar, salt and milk, pour the mixture into the flour and leave for 20 minutes. Add the remaining milk, sugar, egg yolks, butter, zest and a wooden spoon knead a smooth elastic dough. Leave for 1 hour, covered with a film or a towel. Poppy Pour boiling milk, add the remaining ingredients for the filling and leave to swell for 30 minutes. Roll out the dough into a rectangular reservoir, cover the filling, some distance from the edge of 2 centimeters. Roll into a tight roll, put it on a baking sheet, greased again, cover and leave for 1 hour to approach. Bake in preheated 180 degrees Celsius oven for 40 minutes. Grind to glaze icing sugar with the lemon juice to make a thick paste, cover her hot cake.