Sanduiche de mortadella is a Brazilian sandwich originating from Sao Paulo. The huge sandwich consists of a simple bread roll that's filled with mounds of freshly sliced, stacked, and griddled mortadella, while a layer of cheese is added on top, instantly melting as it touches the hot mortadella.
The outer layers of mortadella are crisp and brown, while the inner ones remain silky and supple. Mortadella sandwich really needs no extra condiments, although they are typically available on the counters, and all you really need with this sandwich is a glass of cold Brazilian beer.