For the three layers of filling, seperate the remaining ingredients into three portions, like so: (Layer 1 - 125g Oreos, remaining cream from the oreos, 125g cream cheese, 1 egg yolk, 50ml milk, 50g caster sugar, 125g whipped cream) (Layer 2 - 1 vanilla pod, 250g cream cheese, 1 egg yolk, 50ml milk, 50g caster sugar, 125g whipped cream) (Layer 3 - 150g Nutella, 100g cream cheese, 1 egg yolk, 50 ml milk, 50g caster sugar, 125g whipped cream)