The supplì, on the other hand, is a staple of Roman street food culture. It is typically made with boiled rice, seasoned with meat sauce and worked with raw eggs, mozzarella, and milk before being passed in breadcrumbs and fried exclusively in seed oil. Unlike arancini, the ingredients for the supplì are worked together in a bowl. The Roman supplì traditionally have an elongated, cylindrical shape often with a heart of mozzarella.