Sandwich me Avgo kai Bacon is the egg-and-bacon sandwich as it turns up in Greek bakery and kiosk cases nationally: cold-built, sold ready-wrapped, a small step up in richness from the plain egg version. The angle here is the pairing. Egg on its own is mild and forgiving; add bacon and you introduce salt, fat, and a smoky edge that the rest of the sandwich now has to balance rather than merely carry. Done well it is one of the more satisfying things in a Greek counter case. Done carelessly it goes greasy and one-note fast.
Construction is straightforward and the order matters. The egg is hard-boiled and either sliced or lightly mashed; the bacon is cooked separately until firm, then drained so it is not sitting in its own fat when it meets the bread. Both go into a soft roll or sliced loaf, often with the cut faces buttered. Seasoning is light because the bacon already brings the salt. Good execution means bacon cooked to a real bite and drained properly, egg still tender, bread dry enough to hold structure under the fat. Sloppy execution is limp underdone bacon shedding grease into the bread, an overcooked chalky egg, no drainage so the whole thing turns slick, and over-salting on top of an already salty cure. The fault line is almost always grease management: the counters that get this right are the ones that drain the bacon.
Variation is mostly about how the egg is treated and what rides alongside. Some build it as sliced egg with whole rashers and a leaf of lettuce, cleaner and more structured. Others fold the egg into a mayo mash and lay the bacon over that, richer and softer. A few add a slice of tomato or a smear of mustard to cut through the fat, which the sandwich genuinely benefits from. The plain egg sandwich without bacon is a quieter, distinct build and deserves its own article rather than being crowded in here. As itself, this one lives or dies on whether the bacon was cooked and drained with any attention.