The panino con cima alla genovese is a Genoese sandwich built on a cold cut that is really a sealed pocket of other things. Cima is a breast of veal opened into a flat pouch, stuffed with a Ligurian mixture of egg, peas, herbs, sweetbreads and other offal, sometimes pine nuts, then sewn shut and poached slowly in broth. Pressed under a weight and chilled, it sets firm enough to slice into clean cross-sections that reveal a mosaic of the stuffing through the pale veal. That cut, eaten cold, is the entire sandwich: a single slice of a finished dish, laid in bread, with as little else as possible so the mosaic stays the point.
The craft happened in the poaching and the press, long before any bread is involved. The pocket is filled loosely enough that the egg sets without bursting the seam, poached gently so the veal stays tender, then weighted as it cools so it firms into something that holds a thin, intact slice. By the time it reaches the panino the work is done: the slice is laid cold onto a plain roll or a piece of Ligurian bread, and the bread is deliberately quiet because the cima already carries its own herb, its own egg, its own faint sweetness from the peas. At most a thin layer of something soft helps it sit; nothing acidic is added, since a sharp dressing would cut straight across the gentle, set, almost terrine-like character that is the whole appeal of eating it cold.
The variations are essentially the same dish given a handle in different ways rather than different recipes. There is the plain build of one cold slice on bread, and the version where it sits beside the Genoese larder it belongs to. The wider tradition of cold Ligurian preparations sliced into bread, and of plated regional dishes turned portable, follows its own logic, and each of those deserves its own article rather than being crowded in here.