For the dough, beat the egg whites into snow. Beat the sugar, yolk and water until frothy, then mix in the flour and baking powder, then fold in the egg whites. Spread on a baking sheet and bake at 160 ° C hot air for about 20 minutes. Let the dough cool down.
Whip the cream cheese and whipped cream together, mix in the sugar and chopped berries. Spread on the dough and let cool in the refrigerator for 2 hours.