Brazil's great football rival Argentina has Panchos Argentinos, in which a hot dog is sliced down the middle lengthwise, then coated with toppings like mayonnaise, mustard, and chimichurri.

A hot dog bun straight out ... They are cut vertically along the middle of the rounded top, but the slit does not go all the way through the bun. The side-sliced variety — like for a ballpark ...