Prosciutto, Arugula and Ricotta Piadine Filling

In Romagna, piadine are often served with cured meats, greens and fresh cheeses that soften in the warmth of the freshly cooked bread. If possible, purchase fresh-cut prosciutto, sliced as thinly as possible, and allow it to come to room temperature. The flavor and texture of ricotta cheese varies widely by brand; we like Calabro.