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Skordalia or skordhalia/skorthalia (σκορδαλιά [skorðaˈʎa]; in Greek also called αλιάδα 'aliada/aliatha) is a thick puree (or sauce, dip, spread, etc.) in Greek cuisine made by combining crushed garlic with a bulky base—which may be a purée of potatoes, walnuts, almonds, or liquid-soaked stale bread—and then beating in olive oil to make a smooth emulsion. Vinegar is often added.
Variants may include eggs as an emulsifier and omitting or reducing the bulk ingredient, which makes for a result similar to the Provençal aïoli, Catalan allioli, and so on. In the Ionian Islands, cod stock, and lemon instead of vinegar, is usually added, and skordalia is eaten as a main dish.
Skordalia is usually served with batter-fried fish (notably salt cod, μπακαλιάρος), fried vegetables (notably eggplant and zucchini), poached fish, or boiled vegetables (notably beets). It is sometimes used as a dip.