The Moistmaker is defined entirely by a slice of bread in the middle that no one is meant to notice until they bite it. It is a Thanksgiving leftover sandwich built as a double-decker, and its one structural innovation is a third slice of bread, soaked in turkey gravy, run horizontally through the center of the stack. That gravy-logged slice is the point of the whole thing. It solves the chronic failure of a leftover turkey sandwich, which is that cold sliced turkey reads as dry and the gravy applied from outside either soaks the outer crumb or never reaches the core. Putting the saturated slice on the inside delivers moisture to the center of the bite while the outer bread stays intact in the hand.
The craft is in the construction order and the saturation control. The build is two stacks of leftovers, turkey, stuffing, cranberry sauce, around a central slice that has been dipped or ladled in gravy until it is fully soaked but still holds together as a layer rather than disintegrating into paste. The two outer bread slices are kept dry, often toasted or sealed, so they can be gripped and so they brace a filling that has no structure of its own. The wet center slice is the load-bearing flavor element and the moisture reservoir at once: it is positioned so the gravy migrates outward into the turkey and stuffing under the pressure of the bite instead of running down the eater's hand. The cranberry sauce is placed for its sharp acid to cut the gravy-heavy core, and the stuffing adds the dense, seasoned mass the soft turkey lacks. Get the center slice too wet and the sandwich collapses; too dry and the entire reason for the third slice disappears.
The variations are a matter of how the leftovers around the soaked slice are arranged. A drier reading uses less gravy on the center slice for a sandwich that holds more cleanly; a richer one adds mashed potato to the stack; the order of cranberry and stuffing relative to the wet slice shifts the balance without changing the architecture. The broader Thanksgiving leftover sandwich is the parent genre that runs the same components without the central soaked slice, and it deserves its own article rather than being crowded in here.