Place the coconut dacquoise in a cake ring lined with acetate sheets.
Pour about 1/3 of the coconut mousse over the dacquoise and place the cake in the freezer for 15 minutes.
Remove the cake from the freezer, together with the cremeux and the croustillant.
Remove the cremeux and croustillant from their rings and place them over the coconut mousse.
Pour the remaining mousse into the cake ring and freeze for 1 hour at least.
After one hour the cake should look fairly set. Pour the final layer of ganache (it's best to make the ganache before pouring it, but make sure it's room temperature before using it).
Freeze the cake for a few hours, preferably overnight.
Remove the cake from its ring and place it on a cup or grill for glazing.
Carefully and evenly pour the glaze over the cake and allow it to drip off for a few minutes.
Transfer the cake on a platter and decorate as you wish.