Split the cake, spoon in the filling and the fresh raspberries, then turn it upside down on to a cake stand. Place the icing sugar into a bowl and gradually add the rosewater, mixing all the time until the icing is thick enough to coat the back of a spoon. Pour over the cake and let it drizzle down the sides. Allow to set for an hour or so.
To make the chocolate curls, place a small hea