For the second filling, take 300 grams of cottage cheese, 2 eggs, separate the yolks from the egg whites, send the yolks to the cottage cheese, and the whites in a separate bowl. Grate lemon zest to the cheese, add sugar, vanilla sugar and grind well with an immersion blender. Whisk the egg whites into a soft mousse until a thick foam forms, so that when the dish is turned over, they do not budge and are added to the cheese mass. Gently mix the proteins with a spatula from the bottom up so that the mass becomes homogeneous.