Line a tin with pastry. Put a piece of greased paper in the centre, with a few haricot beans or crusts to weight it down and prevent the pastry rising. Bake blind in a hot oven (400° F., gas mark 6) for 10 minutes. Take the pastry case out of the oven, remove the paper, and spread a thin layer of strawberry or apricot jam on the bottom.
Warm the milk. Beat the eggs and sugar together in