Grease a fat pan (approx. 32 x 39 cm; at least 3 cm deep) and dust with flour. Finely chop the chocolate. Grate black bread finely on a household grater
Separate eggs. Beat the egg yolks, 4 tbsp. lukewarm water, sugar and espresso powder for at least 5 minutes until frothy. Mix ground almonds, flour, cocoa and baking powder and stir in briefly, alternating with the liquid cream. Stir in the grated bread. Beat the egg whites in 2 portions with 1 pinch of salt each and fold in portions. Fold in almond kernels and 3/4 of chopped chocolate with a dough scraper
Spread the dough on the fat pan. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 40 minutes. Let them cool down
Melt the rest of the chocolate in a hot water bath, use a spoon to draw the chocolate into strips over the cake. Let it dry. Dust with icing sugar