For the pastry
- Put the flour and salt into a mixing bowl and rub in the butter until the mixture resembles breadcrumbs.
- Mix in the egg and just enough water (if necessary) to form a dough.
- Shape into a ball and wrap in cling film. Chill for 30 minutes.
- Heat the oven to 200°C (180°C fan) gas 6.
- Grease a 25cm|10" flan dish or tin.
- Roll out the pastry on a lightly floured surface into a round to fit the tin.
- Line the base and sides of the tin with the pastry.