Preparation
Place the egg yolks in a heatproof mixing bowl.
					                Add 40g sugar and the vanilla.
					                Add the vanilla to the egg yolks.
					                Whisk until frothy.
					                Heat 80ml water in a pan.
					                Add the remaining sugar.
					                Heat until the sugar has completely dissolved.
					                Set the bowl with the egg yolk mixture over a pan of hot water. Add the sugar syrup and stir until the mixture thickens.
					                Whip the cream to soft peaks.
					                Stir the vanilla cream over a bowl of iced water until cold.
					                Fold in the whipped cream.
					                Spoon the parfait mixture into small bowls and freeze for 5 hours. Thaw briefly before serving. Turn out before serving if desired.