Knead 125 g flour, 1 egg, 60 g cold butter, 25 g sugar and salt with the dough hooks of the hand mixer to a smooth dough. Wrap in cling film and chill for about 1 hour. In the meantime, finely chop the chocolate and melt it over a hot water bath. Let it cool down a little bit. Beat 200 g butter and 150 g sugar for about 8 minutes until creamy. Fold in 4 eggs individually.
Add sour cream and chocolate and mix. Mix 250 g flour and baking powder and stir in briefly. Put the dough into a greased springform pan (26 cm Ø) and smooth it down. Bake the cake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 50 minutes. 15 minutes before the end of the baking time, knead the shortcrust pastry a little more smoothly. Roll out the dough to a round shape (26 cm Ø) and place on a baking tray lined with baking paper. Prick the dough several times with a fork. Remove the chocolate cake from the oven and let it cool down on a cake rack. Bake the short pastry in the oven at the same temperature for 15-18 minutes until golden brown. Remove from oven and let cool off. Spread the short pastry base with cherry jam. Place chocolate cake on top. Mix mascarpone, low-fat curd, maraschino, liqueur, icing sugar and lemon juice.
Remove the chocolate cake from the oven and let it cool down on a cake rack. Bake the short pastry in the oven at the same temperature for 15-18 minutes until golden brown. Remove from oven and let cool off. Spread the short pastry base with cherry jam. Place chocolate cake on top. Mix mascarpone, low-fat curd, maraschino, liqueur, icing sugar and lemon juice. Spread the cake with the cream. Sprinkle the rolls over it and decorate with the cherries