Chamutzim (חמוצים), the assortment of pickled vegetables, is not a single sandwich but the whole sour drawer that gets folded into one: the cucumbers, turnip, cabbage, peppers, and sometimes carrot or green tomato that an Israeli stand spoons into a pita or lays beside a plate. The angle here is its job inside the bread. In a pocket already heavy with fried chickpea, fatty shawarma, egg, or eggplant plus a thick sesame sauce, the pickles are the acid and crunch that keep the whole thing from collapsing into one dense, oily note. Treated as a topping rather than a side, the assortment is judged less on any one pickle being excellent than on how the mix as a whole lifts and resets the bite.
The preparation is several brines running in parallel, then how they live together in the sandwich. Cucumbers go into a salt or vinegar brine and come out either crisp and lightly sour or fully fermented and soft. Turnip is brined with a wedge of beet that stains it pink. Cabbage is shredded and quick-pickled until it slumps and turns tangy. Peppers, often the long mild green kind or a hotter chili, go in whole or sliced. Each is its own jar, and the eater or the counter hand pulls a little of each so the sandwich gets a range of textures and sharpness in one go. Done well, the mix is varied and firm, sour enough to cut tahini and fat, and chosen with restraint so it threads through the filling rather than flooding it. Done badly, it is all one note from a single tired brine, or so much liquid and so many pieces that the bottom of the pita turns to a sour puddle and the bread gives way.
Variation is mostly in which jars a given place keeps and how hard each is pickled. Some stands lean crunchy and bright with quick vinegar pickles; others lean deep and funky with long ferments that stand up better to fatty meat. A hot pickled pepper changes the whole character of a bite; a sweet-leaning brine softens it. The same drawer feeds falafel, shawarma, sabich, and a hummus plate, and several of its members carry enough identity to deserve their own treatment rather than being merged here: the pink turnip, the cabbage salad, the cucumber pickle, the chopped Israeli salad each do related work as distinct elements. On its own terms the pickle assortment is the sandwich's acid system: get the range and the restraint right, and it is the difference between a pita that stays lively to the last bite and one that goes heavy halfway through.