A classic French tarte tatin recipe is much easier than you think!
Transfer the pastry flour, egg, 1 oz (28 g) of caster sugar and 2,5 oz (75 g) of butter to a blender.
Then transfer it to a floured surface and knead for 2 minutes until soft. Shape the smooth dough into a ball and wrap it in cling film. Let the dough rest at least 30 minutes in the fridge. In the meantime peel the apples and cut them in half. Remove the inside.
Melt 1 oz (28 g) of butter in a pan over low heat. Stir in 2 oz (55 g) of caster sugar.
Turn the heat higher. Let the apples cook for 15 minutes. Shake the pan regularly to avoid burning but don't stir the apples. Roll out the chilled dough in a circle large enough to cover the pan.
Gently tuck the sides in and press to cover the apples fully. Bake the tatin in a preheated oven at 392°F (200°C) for about 30 minutes until light brown. With oven mittens remove the hot pan from the oven. Put a plate on top and turn the pan over fast. Let the tatin cool a bit. Serve lukewarm.