Roll pastry out on a floured surface until 3mm thick. Use an 11cm-round cookie cutter to cut out 6 rounds. Gently press rounds into a jumbo 6 hole muffin tin. Line tart shells with baking paper and fill the bases with baking beans or rice. Bake for 10 minutes, reduce temperature to 180°C, remove paper and beans and bake for a further 10 minutes. Cool slightly.