Cut the vanilla pod in half lengthwise and scrape out the pulp with the back of a knife. Bring milk, vanilla pulp and pod to the boil in a pot. Mix egg yolks and sugar until light creamy. Stir in starch. Add a part of the vanilla milk while stirring, then pour back to the remaining milk.
Bring the cream slowly to the boil while stirring, pour into a bowl and cover the surface directly with foil. Chill the cream for about 45 minutes.