1Cook 1 cup of rice with 1 stick of butter and 3 pinches of salt.
2Separate the egg yolks from the egg whites.
3Add the egg yolks to the cooked rice mixture and mix well.
4Add 1 cup of freshly grated pecorino Romano cheese to the mixture.
5Add 3/4 cup of grated Parmigiano Reggiano to the mixture.
6Add 2 cups of shredded mozzarella to the mixture and mix everything together.
7Roll the rice mixture into balls, dip them in the egg whites, and coat them with breadcrumbs.
8Deep fry the rice balls until golden brown. For the Sicilian rice balls, cook the meat and peas in a skillet first, then add the marinara sauce and simmer for a bit. Make an indent in the center of the rice ball and fill it with the meat and peas mixture before breading and frying.