USA

A Z-Man on a paper-lined board, slices of smoked brisket under melted provolone and two crisp battered onion rings in a plain bun.

Z-Man

At Joe's Kansas City the onion rings go inside the brisket sandwich: smoked brisket, smoked provolone, and fried rings sealed under the kaiser, named for a radio host who called himself the Z-Man.

A small square slider on a soft steamed bun against a pale blue background, a thin beef patty under a slice of melted orange cheese.

White Castle Slider

Five holes in the patty, a griddle carpeted with onions, the bun cooking on top of the beef: the 1921 Wichita original that launched the first fast-food chain and sold America on ground beef.