PREPARATION Preparation of the biscuit: 1- In a bowl, beat the eggs with the sugar and salt until the mixture whitens and doubles in volume. 2- Gradually add the 80 g sifted flour with the 40 g of cocoa powder by gently mixing with a spatula until obtaining a light and airy paste. 3- Spread the dough on a plate (30x40cm) lined with parchment paper. Bake the biscuit in preheated oven at 170 ° C for 12 minutes. 4- Allow the biscuit to warm up before carefully removing the parchment paper. Cut the hard edges of the biscuit. 5- Sprinkle a sheet of parchment paper with a tablespoon of cocoa powder, place the biscuit on top and roll it on itself. 6- Let the biscuit cool down. Preparation of the syrup: 7- Cook the sugar with water and vanilla sugar over low heat until you have a syrupy consistency. Preparation of the cheese mousse: 8- In a bowl, pour the cold cream and icing sugar. Beat the cream until you have a firm whipped cream. 9- Whisk the cheese to make it smooth. 10-...