Which Italian street food is a deep-fried rice ball?

Which Italian street food is a deep-fried rice ball? Arancini is the canonical answer.

Arancini are Sicilian rice balls made from cooked, seasoned rice, commonly filled with ragù, mozzarella, peas, or other ingredients. They are shaped, coated in breadcrumbs, and deep-fried until the outside becomes crisp and golden while the rice remains soft inside.

The name comes from their resemblance to arance, the Italian word for oranges. Their exact shape and name vary across Sicily: round versions are especially associated with eastern Sicily, while cone-shaped versions are common in western Sicily. The singular may appear as arancino or arancina, depending on regional usage.

Arancini are often confused with supplì, a similar Roman fried rice croquette. Supplì typically contains tomato-seasoned rice and a melted mozzarella center, whereas arancini are associated with Sicilian cuisine and have a wider range of fillings.