Spaghetti Cacio e Pepe

You remove the spaghetti from its water after a mere four or five minutes, when it is the sort of al dente that breaks teeth, although it must have softened enough to bend in the pan. You then proceed to ladle in some of its cooking water so that a dish that starts like a conventional plate of pasta is cooked like a risotto, albeit one that is finished with nothing but water and handfuls of pepper and cheese. It is a recipe that is well suited to the non-Italian, most of whom can never mana