The grilling cheese itself was developed in Argentina around 1940 by Italian-born cheesemaker Natalio Alba, who adapted provolone so it would hold its shape on the parrilla.
A thick round of provolone cheese seared on the grill until the outside blisters and browns while the inside turns molten, sprinkled with oregano and chili flakes. It's sold as a starter at parrilla stands and street-side asado counters across Buenos Aires.