Chocolate Mousse Tart in Hazelnut Orange Pastry: Pastry

• 65 g ground hazelnuts (to grind your own, toast under the grill or roast in the oven until a light golden brown and the skins start to flake off, rub together in a tea towel and grind in a food processor or coffee mill)
• 11

Preheat the oven to 375°F/190°C/Gas5.

Put all the ingredients except the orange juice into the food-processor bowl and run the motor for about 7 seconds. Remove to a large bowl and, using a wooden spoon, mix in enough of the orange juice to make a firm dough. Be careful not to