Cook the pasta in salted boiled water.
In the meantime, sift the ricotta, put it in a bowl, and mix it with a few tablespoons of pasta cooking water, until creamy.
Add a handful of grated pecorino cheese, a sprinkling of nutmeg, and the pasta al dente to this ricotta cream. mix well, so that the ricotta is evenly distributed.
Serve sprinkling with pecorino and sprinkle with freshly ground pepper.