The fruit: Mix the prunes and apricots, wine, sugar, lemon zest and juice, cinnemon sticks and vanilla bean in a pot and let it simmer for 20 minutes — or until the fruit is tender. Let it cool before serving.
To prepare the vanilla custard: Whip the egg yolks, sugar and vanilla sugar until smooth and fluffy. Whip the heavy cream until it is quite stiff and mix into the egg mixture. Put the fruit and the vanilla custard in alternating layers in serving bowls. Serve.