Line an 7-in
flan ring with the pastry. Wash the leeks and blanch them in boiling
salted water for 5 minutes. Drain well and cut into rounds 1/2 in thick.
Mix the corn flour with the milk and add the beaten eggs, cream, grated
cheese, salt and a generous amount of black pepper. Fry the bacon
lightly and cut into small dice. Cover the bottom of the flan with the
bacon and leeks, spoon the egg mixture over and bake in a hot oven 200C,
400F, Gas 6 for 30 minutes. Serve hot or cold.