The slinger gives up the second slice of bread and the idea that a sandwich is held in the hand. It is a St. Louis diner open plate: hash browns down first as a base, two hamburger patties or eggs on top, the whole thing flooded with chili and finished with shredded cheese and raw onion, eaten with a fork at a counter at any hour. The defining decision is the same one behind every open-face build. The bread, or here the bed of hash browns, stops being a wrapper and becomes a structural plate that you are also allowed to eat, and the chili stops being a topping and becomes the sauce that binds the whole plate into one thing.
The craft is in keeping that base from disappearing. The hash browns are griddled firm and crisp on a hot flat-top so they can take a ladle of chili without immediately turning to mush before the plate is finished, the same problem a Hot Brown solves with toast under a Mornay. The patties or eggs are the protein layer set into that base; the chili is poured hot over everything so it seeps down and ties the hash browns, meat, and cheese together rather than sitting on the surface. The cheese melts into the chili's heat and the raw onion is the single sharp, cold note cutting an otherwise rich, uniform plate. Timing is the whole game: built and served fast, it holds its layers; left to sit, the base softens out from under it. This is short-order food engineered to be assembled in one pass on one griddle and eaten immediately.
The variations stay inside the open-plate, chili-bound logic and mostly change the protein under the chili. The egg version reads as breakfast, the double-patty version as a late-night plate; a closely related St. Louis build runs the same idea with a different egg-and-meat arrangement. It belongs to the open-face and hot-plate family alongside the Louisville Hot Brown and the Springfield horseshoe, each a regional knife-and-fork sandwich. Those deserve their own articles rather than being crowded in here.