1½´Ç³ú/40²µ plain flour
salt and freshly milled black pepper
pinch of cayenne pepper
a little freshly grated nutmeg
1½´Ç³ú/40²µ butter
2oz/50g mature Cheddar, grated
1 pint/570ml milk
1oz/25g parmesan (Parmigiano Reggiano), finely grated