regular onion
Low in calories with moderate carbohydrates; good source of vitamin C, fiber, and antioxidants (including quercetin), along with prebiotic compounds that support digestive health.
About
The onion (Allium cepa) is a bulbous vegetable belonging to the Amaryllidaceae family, native to Central Asia and cultivated worldwide for millennia. The edible bulb consists of concentric layers of fleshy, modified leaves with a papery golden, red, or white outer skin. Regular onions, or yellow/Spanish onions, are the most common variety, characterized by a pungent sulfurous flavor when raw that mellows and sweetens considerably when cooked. The flavor profile ranges from sharp and acrid in fresh bulbs to deeply caramelized and umami-rich when slowly cooked, owing to the presence of volatile sulfur compounds and amino acids.
Culinary Uses
Onions serve as a foundational aromatic in countless cuisines, forming the flavor base (soffritto, mirepoix, holy trinity) for soups, stews, sauces, and braises. They are used raw in salads, salsas, and relishes, where their pungency provides sharp contrast, and caramelized as a sweet topping or standalone side dish. Onions are grilled, roasted, pickled, or breaded and fried; they complement proteins and vegetables across European, Asian, Latin American, and Middle Eastern cuisines. The degree of doneness—from crisp-raw to deeply caramelized—dramatically alters their role in a dish.