Israeli Salad (סלט ישראלי) is finely diced raw tomato, cucumber, and onion with parsley, lemon, and olive oil, and on the sandwich it is rarely the headline and almost always the part that makes everything else work. The angle is its role as a built-in condiment. It is not a side here so much as the acid, crunch, and moisture layer that cuts through fried, fatty, or rich fillings, and the whole point is that it is chopped small enough to thread evenly through a stuffed pita rather than sit as a separate clump.
The build is about the dice and the dressing. Ripe tomato, firm cucumber, and onion are cut into a uniform fine dice, the smaller and more even the better, then tossed with chopped flat-leaf parsley, a squeeze of lemon, good olive oil, and salt. There is no cooking and almost no margin for sloppiness: the texture is the dish. Inside a sandwich it goes into the pocket of a pita or along a laffa as the bright counterpoint to falafel, sabich, shawarma, or schnitzel, spooned in so a little lands in every bite alongside hummus and tahini. Done right, the vegetables are crisp and freshly cut, the tomato gives up just enough juice to carry the lemon and oil without flooding the bread, and the salt and acid lift everything heavy around it. Done wrong, it is cut coarse so it slides out in chunks, salted too early so the tomato weeps and turns the pita to paste, or made with watery out-of-season tomato so it adds volume but no flavor.
It shifts by the cut and what gets added. A coarser dice eats more like a chopped salad and reads as a side; the fine version is the one that disappears into a sandwich and does its job invisibly. Some hands add bell pepper, radish, mint, or sumac; some finish it with tahini stirred through, which moves it toward a salatim-style dressing that coats rather than refreshes. The closely related forms are recognizable on their own: the tahini-bound version, and the chopped salad served as a standalone meze rather than a sandwich layer. Each deserves its own treatment. They all return to the same idea this one expresses most plainly, which is a finely cut raw-vegetable layer whose entire purpose inside bread is to keep a rich filling from going heavy.