Parmesan Crumbs

• 40 g (1½ oz) unsalted butter
• 40 g (1½

Preheat the oven to 160°C (315°F/Gas 2–3). Rub the butter and flour together to form crumbs. Add the parmesan and hazelnuts and knead together to form a dough. Roll out between baking paper to 5 mm<