Spoon the mousse into the chocolate mould.
Place in the freezer for 10 minutes.
Using a wet spoon, carefully scoop out the centre, leaving space for the jelly.
Place the set jelly into the centre.
Cover the top with mousse.
Place this in the freezer till the mousse is set.
Transfer the tray to refrigerator till serving.
Keep the tray outside for 5 minutes before serving.
Decorate and serve chilled.