In a big bowl, place 1 cup flour, 4 tbsp icing sugar, 100g butter (cut in smaller pieces) and a pinch of salt. Knead the ingredients together, add 1 egg yolk and continue kneading until you obtain a smooth dough.

Grease the baking pan (e.g. with butter). Fill the bottom with the prepared dough. The layer will be very thin. Prick the surface of the pastry with a fork and bake for 15 minutes in 200C/390F.

In the meantime prepare the apples and the crumble. You can buy an already prepared apple sauce or prepare it yourself by cooking apples (peeled and cut in small pieces) with a bit of sugar.

To do the crumble, in a big bowl add 1 cup of flour, 100g butter (cut in smaller pieces), 3/4 cup sugar and 1 cup of shredded coconut. Mix the ingredients together into small crumble-like pieces.

Place a layer of apples on the pre-cooked tart pastry. Sprinkle over with the crumble.

Bake for 15 more minutes in 170C/340F until the crumble turns golden.