Prepare the coffee, the pudding and the chantilly cream.
in the pan, dispose one layer of biscuits, and lightly poor coffee on them with a tea spoon, cover all the layer. Add a layer of chocolate pudding, then biscuits with coffee again, then pudding again, until you have no more biscuits. (the last layer must be biscuits)
cover the top of your cake with chantilly cream and roughly crushed hazelnuts (or slices of fruit).