The fried cheese curds sandwich is a Wisconsin bar snack reassembled into a sandwich, and the curd is doing something no slice or shred can do. A fresh cheese curd is young, squeaky, and still springy, and dropped in beer batter and fried it does not flatten or weep into a sheet the way a slice does: it holds its shape, the inside going molten while the batter sets into a crisp shell around it. A sandwich built on whole battered curds is therefore a stack of individually crisped, individually molten pockets rather than one layer of melted cheese. That structure, many small crisp shells over many small molten centers, is the entire identity.
The craft is in the curd and the timing. The curds have to be fresh enough to be squeaky and cold going into the batter, because a warm or aged curd melts too far and blows out of its shell in the oil. The beer batter fries light and slightly bitter, lifting away from the curd so it stays crisp rather than greasy. The carrier is plain soft bread or a soft roll, never toasted, because the sandwich already carries all the crunch it needs and the bread's job is to blot oil and hold the pile together. The working counter is acid against the fat: a ranch or a marinara on the bread, sometimes a scatter of pickled pepper, never anything that adds richness to an already rich build. It is a tavern and supper-club construction, fried to order and eaten the second it lands, because a fried curd that sits goes from molten to rubbery and the shell goes soft from its own steam.
The variations stay inside that battered-curd frame. A poutine-leaning build adds gravy and pushes it toward an open plate; a curd-and-brat version sets the curds alongside a sausage on the same roll; a smashed-curd griddle build flattens them for crust over melt. Each of those is its own codified reading and deserves its own article rather than being crowded in here.