For the crumble:
Place butter in a large mixing bowl and add vanilla pod seeds. Add sugar and mix with a hand whisk. Add flour and mix with a wooden spoon.
Finish by rubbing in mixture with your fingertips until the mix resembles fine breadcrumbs.
For the spiced apple filling:
Pre-heat oven to 350ºF, 180ºC, Gas mark 4. Place sliced apples, raisins (and the calvados), sugar, spices and water in a bowl mix well. Place in gratin or pie dish, ensure mix is fairly level. Sprinkle crumble mix evenly over, bake in oven for 30-40 minutes, until topping is golden brown.
Remove from oven, spoon out in to warmed dessert bowls, serve with sauce Anglaise.
For the sauce Anglaise:
Bring to boil milk, cream and vanilla pod in a saucepan. Mix eggs and sugar together in a bowl, beating well. Whisk the warm cream to the egg and sugar mix.
Pour the mix into pan on a gentle heat and continue mixing with a wooden spoon until the mix coats the back of a spoon. Remove pan from heat, serve warm.
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