Pastourma (Παστουρμάς) is cured beef, heavily spiced, sliced thin, and it is the defining component behind a small cluster of Greek sandwiches rather than a sandwich itself. It is air-dried, salted beef coated in a thick, fenugreek-heavy spice paste called çemen, close kin to Turkish pastırma. The reason to describe the meat on its own is that everything built from it, the egg scramble, the cheese melt, the plain wrap, lives or dies on the quality of this one ingredient, so it deserves the defining piece written about it directly.
The make is a long process of subtraction and coating. Whole muscles of beef are salted and pressed to draw out moisture, then air-dried over time until the meat firms and concentrates. Once dried it is sealed in çemen, a paste built on ground fenugreek, garlic, and paprika, which forms a dark, aromatic crust and protects the meat as it continues to age. The result is sliced very thin against the grain; thin slicing is not optional, because the meat is dense and the spice crust is potent. Good pastourma is deep red and translucent at the edges when sliced, intensely savoury, with the fenugreek reading as a warm, slightly bitter, almost maple-adjacent note rather than a harsh one, and a firm chew that yields. Sloppy or rushed product is grey-brown, unpleasantly salty without depth, either rubbery from under-drying or dry and crumbling from over-drying, with a çemen crust that tastes dusty and raw instead of integrated.
How it is used follows directly from how strong it is. A little goes far, so it is typically eaten in thin slices warmed in a pan until the fat softens and the spice blooms, or laid sparingly into bread, or scrambled with eggs where its intensity is buffered by something rich and mild. It is rarely eaten in quantity or cold off the slicer the way a milder cured meat might be. The egg version pastourma me avga, the filled pastourma sandwich with cheese or eggs, and the Cretan apaki it is often shelved beside are each full subjects that deserve their own articles rather than being crowded in here. Understood on its own, pastourma is best treated as a seasoning as much as a meat: powerful, aromatic, and used with restraint.