To assemble, ensure you have all elements ready to go.
Take the chocolate shells from the freezer (leave in the moulds) and add about 2 tablespoon of mousse mixture to the bottom of each of them.
Take the raspberry mousse from the freezer and remove from the moulds. Add one raspberry mousse dome to each chocolate shell.
Place one cake cake round on top of the raspberry mousse for each shell. Each shell should be filled to the top at this point.
Place the shells into the freezer and allow to set for approximately 30 minutes.
Remove from the freezer and cover with more tempered chocolate. Spread the chocolate with a spatula to create a smooth bottom to the chocolate bombs.
Leave the chocolate in the freezer for a few hours.
To serve, remove the chocolate bombs from the moulds and place onto a serving plate. Leave to rest for at least 30 minutes before serving.