Mix nuts with cinnamon and 75 g sugar. Mix in 2 eggs. Grease a springform pan with a cane base insert (26 cm Ø) well. Mix flour, 125 g sugar, vanillin sugar, salt and baking powder. Add 2 eggs, quark, rum and 125 g butter in pieces, knead with the dough hooks of the hand mixer to a smooth dough. Form the dough into a roll and divide into 20 pieces.
Press each piece a little flatter. Put the nut filling in the middle of 10 pieces. Whip the dough over it and press it down. Fill the rest of the dough with 150 g plum puree. Place the dough pieces alternately in the mould with the seam facing upwards. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas mark 2) for 40-50 minutes. Melt 100 g butter in a saucepan. Remove the cake from the oven and let it cool down for 10 minutes. Carefully turn out of the tin. Brush with half of the butter. Dust with 25 g icing sugar. Brush with the remaining butter and dust with 50 g icing sugar.
Remove the cake from the oven and let it cool down for 10 minutes. Carefully turn out of the tin. Brush with half of the butter. Dust with 25 g icing sugar. Brush with the remaining butter and dust with 50 g icing sugar. Let it cool down. Roast the nuts and 2 tablespoons of sugar in a pan until the sugar caramelises. Spread on a piece of aluminium foil coated with oil. Let it cool down. Coarsely chop the caramel nuts. Spread 50 g plum jam as small blobs on the cake. Place the caramel nuts on top
Roast the nuts and 2 tablespoons of sugar in a pan until the sugar caramelises. Spread on a piece of aluminium foil coated with oil. Let it cool down. Coarsely chop the caramel nuts. Spread 50 g plum jam as small blobs on the cake. Place the caramel nuts on top
2 hours waiting time