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4-6
Medium
1 hr 10
By Fran Warde
Published 2009
Grenoble is famous for its walnuts and they are used in many recipes. This one is particularly wicked and appears on many menus. Serve with rich, dark coffee.
First make the pastry. Place the flour and butter in a bowl and rub together quickly with your fingers until it resembles breadcrumbs. Add the sugar and mix through. Mix the whisked egg into the pastry mix using a flat-bladed knife, bringing the pastry together to form a dough ball. Wrap in cling film and chill in the fridge for 1 hour.