To prepare pastry, whisk egg whites with vanilla sugar, add sugar and powdered sugar step by step. Whisk until puff froth. Then mix carefully flour with the whites.
Cover the baking tray with parchment sheet, place a half of prepared pastry, shaping a circle, put the second half at the edges of the base, shaping balls. Bake meringue base for 2 hours over 445°F.
Mash a half of berries with 2 trablespoons of sugar.
Whisk cream with powdered sugar, sprinkle with vodka and put on the meringue base. Put the remaining berries on it and top with berry puree.