For the dough, whisk eggs in a mixing bowl. Stir in sugar, oil and cola briefly. Mix flour, baking powder and cocoa and fold into the egg mixture until everything is just mixed.
Pour the dough into a greased springform pan (26 cm Ø), dust with flour. Bake in the preheated oven (electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer) for approx. 35 minutes. Let it cool down.
For the decoration heat cream and coconut oil in a pot. Divide the chocolate into pieces and melt in them. Stir well. Cover the cake with the icing and let it dry for about 5 minutes. Cut a triangle out of the cake and place it on the opposite side with the tip as a fin. Decorate the cake with the chocolate lentils and leave to dry.