Grana Padano tart with walnut pastry

Method

1. Preheat the oven to 200C/fan180C/gas 6. Put the walnuts in a food processor and whizz until finely ground. Add the flour and butter and whizz again to fine breadcrumbs. Pour in 3-4 tablespoons of very cold water and pulse until it forms a firm dough. Cover and chill for 30 minutes.
2. Roll out the pastry on a floured surface and use to line a rectangular 35cm x 11cm loose-bottomed fluted flan tin. Prick the base, fill with crumpled foil and bake for 10 minutes. Remove and discard the foil.
3. Lower the temperature to 180C/fan160C/gas 4. Beat the cream, whole eggs and egg yolks together well. Stir in the cheese and some black pepper. Pour into the pastry case and bake for 25 minutes, until just set.
4. Allow to stand for 5 minutes, then carefully remove the tart from the tin. Cut into slices and serve while still warm with a tomato and red onion salad.