Mix the butter, flour, baking powder, egg yolks and sugar knead the dough spread in the form and bake in the oven at 200 degrees until Golden brown. While baking the dough, beat the whites with the sugar and lemon juice until peaks. You can add a package of vanilla sugar. Take the dough spread it on the berries. If they are frozen, then a little bit to thaw them in the oven directly on the dough and sprinkle with sugar a bit.

On top of the berries spread our protein cream. And bake until Golden brown.

Take it out and we had a wonderful and beautiful dessert that is quite simple to prepare.