I love your sense of adventure, scrumps! 
 
Here you go:
 
From Paul A Young's Adventures in Chocolate (I want to marry him)
 
This is for the ganache, but it's so soft that it's best to put a chocolate shell around it.
 
1 small jar of Marmite
1 litre spring water
500g golden caster sugar
750g Madagascan chocolate 64% dark, broken into pieces
 
Pour the Marmite, water and sugar in a pan, bring to the boil and simmer for 3 mins. It is very important to do this in order to mellow the flavour of the Marmite slightly. Pour on to the chocolate and then emulsify in a blender for 30 seconds. Allow to cool before using to fill shells, or leave to set in the fridge and then hand roll truffles. 
This ganache will last for 2 weeks in kept in fridge.[/QUOTE]
 
This ganache will last for 2 years... who's going to eat it?
 
HATE MARMITE! (love Bovril

)