Pita Gyros me Ketchup is the standard pita gyros with ketchup added, a routine request at counters across Greece and the regional default in much of the north. The angle here is narrow and specific: what a stripe of ketchup does to the balance of a gyros, and how a good shop doses it so the sweetness reads as seasoning rather than dessert.
The build follows the usual order with ketchup folded into the sauce layer: warm griddled pita, tzatziki and now ketchup on the bread, carved gyros off the spit, tomato, onion, fries, rolled into a cone. Ketchup is doing a deliberate job here, a hit of sweet and tangy that plays directly off the salty fat of the meat and the crisp patates, the same logic that makes ketchup natural alongside fries in the first place. Good execution runs it as a thin stripe down the pita, often paired with mustard in the northern style, so it lifts the round without burying the meat. The tzatziki either stays in a reduced amount or is dropped entirely when ketchup and mustard are carrying the sauce, which is the standard Thessaloniki-style approach. Sloppy work drowns the wrap in a thick squeeze of cheap, oversweet ketchup that flattens everything into one sugary note and turns the bottom of the cone wet and slack; the opposite failure is ketchup that fights an undiminished load of garlicky tzatziki so the sauces clash instead of layering. The structure is unchanged, still a soft pita, a tight roll, a sealed base, but a watery ketchup makes leaks worse, so dosing matters.
This variant exists because ketchup is genuinely standard in large parts of Greece, especially the north, not a foreign imposition, and it is a clean test of whether a shop integrates a sweet sauce or just dumps it on. Some counters treat ketchup and mustard as the baseline and serve tzatziki only on request; others keep tzatziki primary and add a restrained line of ketchup for those who ask. The northern, ketchup-and-mustard gyros thessalonikis tradition it grows out of deserves its own article rather than being crowded in here; at this entry the single variable is the ketchup and how well its sweetness is balanced against the salt and fat around it.