Beat the butter and sugar, add eggs, vanilla, lemon zest and baking powder, mixed with flour and ground nuts . Thus prepared dough is rolled thick sheet and cut into rectangles that are pinched by the two short sides, to form such boats. Bake in a greased baking dish to pinking. Once cool, lodchitsite filled with a cream which was prepared from the chocolate melted in a water bath with the milk while stirring continuously. Be kept cold until the chocolate hardens.