Bring a large saucepan of salted water to the boil. Add the pasta and cook for the time indicated on the packet.
Meanwhile, in a large bowl, mix together the pecorino, Parmigiano and black pepper.
Once the pasta is al dente, drain and add to the cheese mixture, reserving the cooking water.
Mix well, then gradually stir through 4 to 5 tbsp of the reserved cooking water, a spoonful at a time, until the cheese melts and the sauce coats the pasta.
If the sauce is too dry, add a little more water and continue to stir until smooth.`
Serve with an extra grind of black pepper and an extra sprinkling of pecorino.