Preheat the oven to 200°C (400°F) Gas 6.
Put the milk, cream, vanilla, cinnamon, star anise, vanilla and Calvados in a saucepan over medium heat and bring to the boil.
Put the whole eggs, egg yolks and sugar in a stand mixer or in a mixing bowl using an electric whisk and whisk until pale and fluffy.
Slowly pour the boiled cream into the egg mixture, whisking vigorously until evenly incorporated.
Pass the mixture through a fine sieve and discard the vanilla bean, cinnamon
stick, star anise, and any bits of eggshell that may have accidentally crept in!
Halve the croissants horizontally and brush the melted butter over them.
Arrange them in the prepared pie dish or baking pan.
Halve, core and roughly chop the fresh apples. Scatter these and the semi-dried apples over the croissants in the pan, then pour the custard over the top.
Using a spatula, press down the croissants so that they start to soak up some of the lovely custard mixture.
Bake in the preheated oven for 25 minutes. It should still be a little runny in the middle.
Serve with vanilla ice cream, or just some whipped cream flavoured with a little lemon and vanilla extract