onion; sliced
Onions are a good source of vitamin C, dietary fiber, and antioxidants including quercetin. They are low in calories and contain compounds with potential anti-inflammatory properties.
About
The onion (Allium cepa) is a bulbous perennial plant of the amaryllis family, native to Central Asia and widely cultivated across temperate and tropical regions. The edible portion is the underground bulb, composed of concentric layers of fleshy leaf bases covered by papery, golden to reddish-brown outer scales. Onions vary significantly in size, shape, and color—from small pickling varieties to large Spanish onions, and from white and yellow to red varieties. The flavor profile ranges from pungent and sharp when raw to sweet and mellow when cooked, due to the presence of sulfur compounds and fructose that transform during heat exposure. Yellow onions are the most common all-purpose variety; red onions are milder and slightly sweet; white onions are crisp and peppery.
Culinary Uses
Sliced onions serve as a foundational aromatic in countless cuisines, providing depth and complexity to stocks, sauces, soups, and braises. Raw sliced onions appear in salads, salsas, and as garnishes, offering sharpness and crisp texture. When caramelized over low heat, they become deeply sweet and are essential to French onion soup, gratins, and burger toppings. Sliced onions are sautéed as part of soffritto (Italian), mirepoix (French), or the holy trinity base (Creole), forming the flavor foundation for countless dishes. They are also grilled, roasted, pickled, and fried. Pairing is nearly universal—onions complement proteins, vegetables, grains, and legumes across Mediterranean, Asian, Latin American, and other culinary traditions.