Base: Beat eggs foam, gradually poured from sugar. Stir until a fluffy mixture volume. Add the pre-sifted flour, stirring with a spatula. Zest of 1 lemon, add it at the cream and mix. Spread on baking paper in the tray with the largest size 30x40 cm. On the bottom we put bits in advance cow butter. Bake the base for 15 minutes at 180 degrees. After his firing, put it on a cloth previously sprinkled with sugar crystals. Carefully roll. Cover with towel and leave to cool Sugar syrup: heating water and sugar for 5 minutes on medium heat. Cream: Beat the butter with the sugar, add the starch. Blend the ingredients, pour in cold milk. We heated the cream, stirring constantly. Sprinkle with vanilla. Whipped cream snow, add it at the cream. We're moving chilled roll on aluminum foil. Pour the bottom of the PCB with the sugar syrup. Greased surface consistent with jam, cream and again the sweet. Rolled up, covered with fthe oil and leave in the fridge to set.