Sift the flour and pinch of salt into the bowl of a food processor; add 60g of the butter and blitz for about 20 – 30 seconds, until the mixture resembles fine breadcrumbs. Through the top of the food processor, with the motor still running, add between 1 and 2 tbsp. ice-cold water until a rough dough forms and begins to just ball together. Remove from the food processor and gently shape to form a round. Cover in clingfilm and chill in the fridge for at least 1 hour. Alternatively, use shop bought shortcrust pastry.