Knead the flour, egg, fat in flakes, 75 grams of sugar, vanillin sugar and a pinch of salt to a smooth dough, cover and refrigerate for about an hour. Grease a springform pan (26 cm Ø) and dust with flour. Roll out 2/3 of the dough between two layers of cling film to a circle (26 cm Ø). Line the bottom of the springform pan with it. Form a roll from the remaining dough and press it to the edge of the mould.
Cut the rim smooth and prick the base several times with a fork and chill. In the meantime, scrape the currants from the panicles. Wash and drain blueberries, currants and raspberries if necessary. Set aside a little of each type of berry for decoration. Beat the egg whites with a pinch of salt until stiff, add the remaining sugar. Carefully fold the almonds, starch and berries into the egg mixture. Sprinkle breadcrumbs over the base of the pastry and smooth the egg mixture over it. Bake the cake in the preheated oven (electric: 175 °C/ gas: level 2) for 50-60 minutes. Leave to cool completely on a grill.
Carefully fold the almonds, starch and berries into the egg mixture. Sprinkle breadcrumbs over the base of the pastry and smooth the egg mixture over it. Bake the cake in the preheated oven (electric: 175 °C/ gas: level 2) for 50-60 minutes. Leave to cool completely on a grill. Remove the cake from the tin and decorate with the remaining berries and mint. Makes 12 pieces