Blend puree, whipping cream, vanilla bean, cocoa powder and natur agrum togther with a Micromix.
Mix pectin and caster sugar together in a bowl.
Warm the puree mixture in a saucepan to 45˚C, whisk in pectin mixture and bring to a boil.
Incorporate in chestnut paste.
Cool down the mixture to 40˚C, incorporate in butter and emulsify well with a Micromix.