Dead easy to make.
Ingredients
Two egg yolks
2/3 Cup of caster sugar
125g cream cheese
125g milk chocolate
125g dark chocolate
600ml thickened cream.
Beat the egg yolks, sugar and cheese together.
Melt the chocolate and beat into the cheese mixture (be really careful to make sure the chocolate isn't hot and is only just melted - you're not looking to cook your egg yolk).
In a separate bowl beat the cream until it's whipped and peaks are forming. Fold through the chocolate mixture. Refrigerate overnight.
You can make a ton of variations - for white mousse (which is divine with fresh fruit) just use 250 white chocolate instead of milk and dark. For Rum n Raisin just use Old Jamaica, You get the idea.