For the pastry: Combine the flour, sugar and butter in a food processor. Process until mixture resembles breadcrumbs. Add the water. Process until pastry just comes together, adding a little more water if necessary. Turn onto a lightly floured bench. Knead gently until the base is smooth. Cut pastry in half and press each into a 12cm round. Wrap in greaseproof paper. Refrigerate 15 minutes or until firm enough to roll out.
Roll 1 piece pastry out between two sheets baking paper to about 5mm-thick. Cut 2x18cm rounds from the pastry. Use to line base and side of two pans. Press the unused pastry together, roll out to 18cm round and use to line a third pan. Repeat with the second piece pastry. Refrigerate or freeze until firm pastry is firm.
Place a flat tray into the oven. Preheat the oven and tray to 200°C fan forced. Scrunch six, 18cm rounds of greaseproof or baking paper. Flatten the paper out the place into each pan to cover the pastry. Half fill each pan with baking beans or raw rice. Place onto the hot tray and bake for 15 minutes or until the edges are light golden. Carefully remove the beans and paper. Place the pans back into the oven on the hot tray and bake a further 15 minutes or until golden. Set aside to cool in the pans.
For the custard: Whisk the egg yolks, sugar, vanilla, cornflour and plain flour together in a bowl until pale and creamy. Add the milk slowly, whisking constantly until smooth. Pout the mixture into a saucepan. Cook over medium-low heat, whisking constantly until custard just comes to the boil. Pour into a clean bowl, cover the surface with wrap and refrigerate until cold.
Combine all the berries is a bowl. Sprinkle over the sugar. Cover and refrigerate 2 hours or until a syrup forms.
Loosen the sides of the spring form pans and place the pastry shells onto a serving board or platter. Whisk the custard then spoon into the pastry cases. Spoon over the berries and syrup. Serve.
TipYou will need six, 10cm (base), 5cm deep individual springform pans for this recipe.