Stir pudding powder and 100 ml milk until smooth. Bring 650 ml milk to the boil, stir in the pudding powder, simmer again for about 1 minute. Let cool off while stirring occasionally. Drain mandarin oranges in a sieve. Melt the fat and let it cool down. Separate the egg, chill the egg white.
Put flour in a mixing bowl. Add fat, sugar, vanillin sugar, lemon peel and egg yolk. Use the dough hooks of the hand mixer to make crumbles. Grease the bottom of a springform pan (26 cm Ø) and dust with flour. Press half of the crumbles on the bottom, keep the rest of the crumbles cold. Beat the egg white until stiff, add 1 pinch of salt. Stir the poppy seed filling into the pudding. Fold in the mandarins and beaten egg white. Smooth the filling on the base and sprinkle with the remaining crumbles. Place a sheet of baking paper on a rack and place the tin on top. Bake the cake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) on the lower rack for about 1 hour. Remove from the oven and allow to cool in the mould on a cake rack.
Fold in the mandarins and beaten egg white. Smooth the filling on the base and sprinkle with the remaining crumbles. Place a sheet of baking paper on a rack and place the tin on top. Bake the cake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) on the lower rack for about 1 hour. Remove from the oven and allow to cool in the mould on a cake rack. Remove the cake from the tin. Mix the icing sugar with the lemon juice to a glaze. Sprinkle over the cakes
waiting time 2 hours