For the pastry: 150 g butter, 250 g flour (or 250 g gluten free flour and 1 tsp xanthan gum), 2 tbsp icing sugar.
Make the pastry: rub the butter and the flour until the mixture resembles fine breadcrumbs. Add the sugar. Wrap the dough in cling film and chill it for 30 min.
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Preheat the oven at 180 C.
Roll the pastry into a tart tin.
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