Bring the milk with the grated lemon zest, the vanilla stick and the pinch of salt to the boil. Meanwhile, beat a firm snow out of the 3 egg whites and lift a spoon from each of them to place it carefully in the boiling milk. Turn the egg white dumplings after 1 minute and carefully remove them with a sieve after about 30 seconds. Place in a glass bowl.
Now stir the 3 egg yolks with the sugar until frothy. Add this mixture to the milk on the stove over low heat, stirring constantly. As soon as the bird milk has a slightly thicker consistency, it is ready.
Let the cream cool down and carefully pour it onto the egg white dumplings.