Once all the components have been made, start by filling the molds about ¼ up with the mousse.
Add the insert at the center and press gently. Add ¼ of mousse to cover the insert. Add the biscuit and feuilletine bands.
Fill the rest with mousse until sealed and freeze until set.
Pipe the whipped ganache decoratively (refer to the picture for decoration). Freeze until set.
Spray with chocolate spray and freeze.
Glaze the Buche and place the frozen whipped ganache decoration on top of the Buche.
Decorate with white chocolate décor of your choice.