White Chocolate and Raspberry Tart With a Cocoa Crust

Harry’s favourite birthday tart. It reappears every July, but late raspberries in November mean you can still taste the fragrance of late summer, and the sharp, lactic crème fraîche offsets the terrifying sweetness of white chocolate and stops it being too sickly. I am writing this with four cocoa crusts just out of the oven, all made in one go in the Magimix, so this is something for a big party if you want special and easy. Make the filling first, as it needs to chill.