or medium onion
Medium onions are low in calories (approximately 40 calories per 100g) and provide dietary fiber, vitamin C, and folate; they also contain quercetin and other sulfur-based compounds with potential anti-inflammatory and antioxidant properties.
About
An onion is a pungent bulbous vegetable of the Allium cepa species, belonging to the same family as garlic, leeks, and chives. Native to Central Asia, onions are now cultivated worldwide in temperate and subtropical climates. A medium onion typically weighs 150-200 grams and has a diameter of 2-3 inches. The bulb consists of concentric layers of pale white or golden-yellow papery skin enclosing fleshy, edible layers with a sharp, sulfurous flavor that becomes sweet and mellow when cooked. The pungent character derives from volatile compounds containing sulfur that are released when cell walls are damaged during cutting.
Raw onions offer a crisp, biting taste with slight sweetness, while cooking transforms them through caramelization and the breakdown of sulfur compounds into a complex, sweet, savory depth. Major cultivars include yellow/Spanish onions (most common, mild-sweet), white onions (sharper flavor), and red/purple onions (slightly sweet, milder).
Culinary Uses
Medium onions serve as a foundational aromatic in countless cuisines, providing depth and body to soups, stews, sauces, and braises. They are typically diced or sliced and sautéed as a mirepoix base (with celery and carrot) in French cooking, or used alone as a soffritto in Italian cuisine. Raw onions are featured in salsas, salads, chutneys, and pickled preparations for their sharp bite. Caramelized onions are prized as a condiment and filling, while grilled or roasted whole onions serve as a vegetable side dish. Their versatility spans from delicate French onion soup to Indian curries, Latin American sofrito, and Middle Eastern preparations.