Knead almonds, flour, fat, 120 g sugar, vanillin sugar, salt and egg to a smooth dough. Wrap in cling film and refrigerate for about 1 hour. In the meantime, peel and quarter apples and cut out the core. Cut apples into pieces and sprinkle with lemon juice. Mix pudding powder with 100 ml apple juice and 100 g sugar. Put apples and 600 ml apple juice in a pot and bring to the boil while stirring occasionally. Let it boil for about 1 minute. Add raisins and thicken with mixed pudding powder. Let it boil for about 1 minute, remove from heat and let it cool down. Roll out approx. 2/3 of the dough on a floured work surface (approx. 35 cm Ø) and line a greased springform pan (26 cm Ø) with it. Pull the dough up about 5 cm at the edge of the springform pan. Spread the cooled apple mixture on the dough and smooth it down. Roll out the rest of the dough (approx. 26 cm Ø), place it on the apple mixture and press it well to the edge of the dough. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 1 hour. Cover after about 40 minutes. Let cool completely on a cake rack. Roast the flaked almonds in a pan without fat until golden brown. Beat the egg whites until slightly frothy, add icing sugar and stir to a smooth glaze
If the icing is too thick, add 3-4 tablespoons of water. Spread the cake all around and sprinkle with almond flakes. Let it dry. Dust with icing sugar and serve decorated as desired with apple slices and lemon balm. Whipped cream tastes good with it
waiting time approx. 3 hours