Finely chop 50 g nuts in the universal chopper. Separate the eggs. Beat the egg whites and 3 tablespoons of cold water in a large bowl until stiff, adding sugar. Stir in egg yolks. Mix flour, ground nuts and baking powder and fold into the egg mixture.
Put the mixture on a baking tray lined with baking paper and spread evenly. Bake the sponge cake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 8 minutes. Remove, turn out on a tea towel, remove baking paper immediately. Let the sponge cake cool down and cut into thirds. Stir jelly until smooth and spread on 2 pastry plates. Place these sponge cake plates on top of each other and finish with the 3 plate. Straighten the edges and chill for about 30 minutes. Coarsely chop the chocolate coating separately and melt in a bowl over a warm water bath. Cut the sponge cake with a sharp knife into approx. 36 small cubes/petit fours, place them on a cake rack.
Place these sponge cake plates on top of each other and finish with the 3 plate. Straighten the edges and chill for about 30 minutes. Coarsely chop the chocolate coating separately and melt in a bowl over a warm water bath. Cut the sponge cake with a sharp knife into approx. 36 small cubes/petit fours, place them on a cake rack. Partially cover the petit fours with chocolate coating by the spoonful. Decorate some petit fours with chocolate door strips and/or nut kernels and chopped nuts
45 minutes waiting time