Royal Vatroushka

Combine eggs with cottage cheese and half a cup of sugar, add vanilla sugar, and whip everything together until you get a smooth, uniform mixture.

Grate cold butter on a box grater, then mix it with flour, half a cup of sugar, half a teaspoon of salt, and baking soda.

Work the mixture together until the butter is evenly distributed throughout the flour. The dough should hold together when pressed, but still have that nice crumbly texture.

Split the dough in half. Press the first half onto a baking sheet, spread it out nicely, and build up the sides to create a rim.

Pour in the filling. Top it off with the second half of the dough, crumbling it evenly over the filling.