In a large bowl, whisk together the flour, milk, eggs, sugar, salt, and sparkling water until you have a smooth batter.
Heat a skillet over medium heat. Melt butter in the skillet. Pour a thin layer of batter onto the hot skillet to make thin pancakes, cooking until golden brown on both sides. Set the cooked pancakes aside.
For the filling, combine the cottage cheese, powdered sugar, vanilla extract, sour cream, and grated lemon zest in a bowl. Mix until smooth and creamy.
Line a cake pan with a pancake. Spread a layer of the cottage cheese cream over the pancake. Continue layering the pancakes and cream until all ingredients are used, ending with a pancake on top.
Place the cake in the refrigerator for at least 2 hours to allow the flavors to meld and make it easier to slice.
Before serving, sprinkle with powdered sugar and garnish with fruit or mint, if desired.
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