Cream fat, 90 g sugar, vanillin sugar and salt with the whisk of the hand mixer. Separate 2 eggs. Set the egg whites aside. Stir egg yolk and 1 egg one after the other into the fat-sugar mixture. Mix flour, 50 g starch and baking powder and stir in portions. Grease a springform pan (26 cm Ø).
Fill in the dough and smooth it down. Mix quark, lemon juice, 40 g sugar, 2 eggs and 25 g starch with the whisks of the hand mixer and spread on the dough. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 20-25 minutes. In the meantime, clean, wash and cut the rhubarb into pieces. Beat the egg white until stiff. Add 90 g sugar. Fold in rhubarb. Spread the meringue mixture over the hot cake and bake for another 10 minutes at the same temperature. Roast the flaked almonds in a pan without fat until golden brown. Remove from the pan and let it cool down. Remove the cake and let it cool down. Heat up the jam, pass it through a sieve and spread it on the edge of the cake.
Spread the meringue mixture over the hot cake and bake for another 10 minutes at the same temperature. Roast the flaked almonds in a pan without fat until golden brown. Remove from the pan and let it cool down. Remove the cake and let it cool down. Heat up the jam, pass it through a sieve and spread it on the edge of the cake. Press the flaked almonds to the edge. Crumble 2 meringue tuffs and sprinkle over the cake. Decorate the cake with the remaining tuffs
Waiting time approx. 30 minutes