The turkey Rachel is the version of the Rachel where the turkey is the point, not a substitution someone allowed. Where the deli Rachel can be read as a corned beef sandwich that traded its kraut for slaw, the turkey Rachel commits fully to the lean bird and builds the whole sandwich around it: roasted or smoked turkey breast, Swiss, coleslaw, and a creamy dressing, griddled on rye. The defining decision is choosing turkey on purpose rather than as a milder stand-in, because turkey changes what the griddle has to do. It brings no cure, almost no fat, and a clean flavor that will sit there politely unless every other component is built to carry it.
The craft is in how a lean meat behaves under the same heat the Reuben uses. The build is still stacked on rye and pressed in butter until the Swiss melts down and binds the structure and the bread crisps on both faces, but turkey has no rendering fat to baste itself, so the slaw and the Swiss are doing the lubricating the corned beef would otherwise do. The coleslaw carries sugar and a creamy dressing rather than a fermented brine, so it browns and warms differently against the meat and cuts the Swiss with sweetness instead of acid. Like the kraut it replaces it carries water, so it has to be drained and dressed tight or it floods the rye and the bottom slice gives way under the spatula. The Swiss goes against the bread on both inner faces so the melt glues the structure and shields the crumb from the wet slaw at once, and the dressing, Russian or Thousand Island, supplies the richness from inside the sealed sandwich that the turkey itself never will. The timing is the Reuben's: deep gold rye at the exact moment the Swiss is fully molten, only now over a sweet, lean filling that punishes a careless cook with a dry result.
The variations track how far the turkey reading wants to go. A smoked-turkey build leans into the bird and reads against the Swiss instead of with it; a roasted-turkey build is the milder and more common one; a version on pumpernickel changes the bread but not the logic. The Rachel sits inside the Jewish deli's smoked-meat shelf alongside the Reuben it answers to and the towering combination builds, and each of those is a single substitution on a fixed technique that deserves its own article rather than being crowded in here.