🇪🇸 Spain · Family: El Bocadillo y la Mesa · Region: Catalonia/National
Alioli is a garlic emulsion, and like olive oil it sits in this catalog as a condiment rather than a sandwich because its job is to make other things better, including a great many bocadillos. The name is literally all i oli, garlic and oil, and in its strict Catalan form that is the entire ingredient list: garlic and olive oil bound into a thick, pale, aggressively pungent paste with nothing else in it. The version most bars actually serve is a garlic mayonnaise, with egg added to make the emulsion forgiving and stable. Both are alioli; they behave differently and they taste different, and it is worth knowing which one is on the plate.
The traditional preparation is a test of patience and not much else. Peeled garlic is pounded to a smooth paste in a mortar with a little salt, then olive oil is added in a painfully slow trickle while the pestle keeps moving in one direction, the paste thickening as it takes up the oil until it stiffens into something that holds a peak. Done well it is glossy, dense, and so sharp it makes the back of the jaw ache pleasantly. Done badly it breaks: the oil and garlic separate into an oily slick because the oil went in too fast or the mortar was too cold. The egg-bound version is far easier, whisked or blended like a mayonnaise with garlic, and the common failure there is the opposite problem, a bland pale sauce with timid garlic and too much neutral oil, which is just flavored mayo wearing the name.
In a sandwich it functions as both moisture and seasoning at once, which is why it turns up under grilled meat, in seafood bocadillos, alongside patatas bravas served on the side, and pressed into the warm crumb of a bocadillo de calamares. Each of those is a real dish in its own right and deserves its own article rather than being crowded in here. The point of the entry is the sauce itself: a spoonful of properly made alioli carries more force than its size suggests, and a loaf built around it should be assembled with that in mind, used as a structural seasoning rather than a decorative smear.
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Other El Bocadillo y la Mesa sandwiches in Spain: