Panino Piastrato con Prosciutto di Parma, Cipolle Caramellate e Toma

The **Panino Piastrato con Prosciutto di Parma, Cipolle Caramellate e Toma** is a pressed Italian sandwich originating in the Piedmont region and notably served at the Area di servizio Rio Colorè Ovest in Bra, Italy, a venue associated with the creator Franchino Er Criminale. “Piastrato” refers to the sandwich being grilled or pressed in a hot pan or press, a technique that gives the bread a crisp, toasted exterior and melts the cheese evenly into the filling. Key ingredients include Prosciutto di Parma, prized for its delicate sweetness and saltiness; caramelized onions, which contribute a deep, savory-sweet complexity; and Toma, a semi-soft Piedmontese cow’s milk cheese with a mild, buttery flavor that melts smoothly. What distinguishes a great version lies in the balance of textures and temperatures: the bread must be hot and crisp, the prosciutto left slightly warm but not overcooked to preserve its silky texture, the onions slow-cooked until deeply golden without bitterness, and the Toma melted just enough to bind the components without becoming greasy. Regional variations across Italy might substitute the Toma with other local semi-soft cheeses like Fontina or Taleggio, or add roasted peppers, arugula, or balsamic reduction. In Piedmont itself, the trio of cured ham, sweet onions, and melting cheese is a classic combination, often found in both roadside service areas and traditional trattorias. The version at Rio Colorè Ovest, as refined by Er Criminale, emphasizes high-quality dry-cured ham and properly caramelized allium, making it a benchmark for the style.