Heat the oven to 350 degrees F/175 degrees C and bring a full kettle to the boil for a bain-marie. Make the framboise: Put the chocolate, raspberry puree and sugar in a bain-marie and heat to melt, then bring to a boil to thicken. Whisk in the butter, a piece at a time, until smooth. Remove from the heat and beat in the eggs, one at a time. Strain into a tinfoil lined 4 cup/1 litre charlotte mold or metal bowl. Set the mold or bowl in a casserole that will accommodate it, pour the water halfway up the sides of the mold, and bake until the mixture has risen and set, about 45 minutes. Remove from the casserole dish and let cool. It will shrink. Cover and chill overnight. Turn the framboise out onto a serving plate. Spread with a thin layer of whipped cream and then cover with fresh raspberries, starting at the base and rising up over until the cake is completely covered.