– 3 onions

The onion (Allium cepa) is a bulbous herbaceous perennial plant of the amaryllis family, native to Central Asia and cultivated worldwide for millennia. The edible bulb consists of concentric layers of fleshy, modified leaf bases that range in color from white and pale yellow to deep purple, depending on cultivar. The flavor profile varies dramatically by variety and preparation: raw onions deliver pungent, sulfurous compounds (particularly in yellow varieties) that bring sharp, acrid notes; cooking breaks down these compounds into sweet, caramelized sugars, transforming the onion's character entirely. Major cultivars include yellow onions (the standard cooking onion), white onions (milder, preferred for fresh applications), red/purple onions (sweet and colorful), and sweet varieties such as Vidalia and Walla Walla.

Onions function as a foundational aromatic and flavor base across virtually all savory cuisines. Diced onions sautéed in fat form the mirepoix base of French cooking and the soffritto of Italian cuisine, building umami depth into stocks, sauces, and braises. They appear sliced raw in salads, pickled, caramelized as a condiment or sweet side dish, roasted whole, deep-fried as rings, or ground into pastes and chutneys. In Asian cuisines, they feature prominently in stir-fries, curries, and as garnishes. The cooking method dramatically alters their culinary function: brief cooking preserves sharpness; extended caramelization produces intense sweetness and complexity.