First, make the pastry. Tip the ingredients into a food processor with 1 /4 tsp salt. Blend until the mixture resembles breadcrumbs. Drizzle 2-3 tsp cold water into the funnel while the blade is running – the mixture should start to clump together. Tip onto a work surface and bring together, kneading briefly into a ball. Pat into a disc, wrap in cling film, and chill for at least 20 mins. Heat oven to 200C/180C fan/gas 6.