Mix the ricotta with the egg yolks and rocket, season with pepper and salt and then add the flour + the parmesan. Knead everything into a smooth dough (the dough must not become too firm, if it is still slightly sticky, it is good).
Cut off small knobs with a tablespoon and cook in salted boiling water for 5-6 minutes.
Fry the drained cams in a pan in a little butter until they start to turn golden. Then sprinkle with parmesan and serve on plates.