half an onion chopped in large chunks
Onions are a good source of vitamin C, fiber, and antioxidants including quercetin; they contain prebiotic compounds that support digestive health. They are very low in calories (approximately 40 per 100g raw).
About
The onion (Allium cepa) is a bulbous herbaceous plant in the allium family, native to Central Asia and widely cultivated globally. The edible bulb consists of concentric layers of modified leaves with a papery outer skin that ranges in color from pale yellow to deep purple, depending on variety. Common varieties include yellow onions (assertive, sulfurous flavor when raw, sweet when cooked), red onions (milder, slightly sweet with purple hue), and white onions (sharp, crisp). Raw onions contain volatile sulfur compounds responsible for their characteristic pungency and lachrymatory effects; cooking breaks down these compounds, producing sweetness and caramelized complexity.
Culinary Uses
Onions function as a foundational aromatic in countless cuisines, forming the flavor base for stocks, soups, stews, and sauces across European, Asian, Latin American, and Middle Eastern traditions. Large chunks are commonly used in roasting (particularly for caramelization), braising, and slow-cooked preparations where the onion's natural sweetness develops over extended cooking. Chopped onions are essential components in mirepoix (French), soffritto (Italian), and trinity preparations (Louisiana Creole). They pair effectively with meats, vegetables, legumes, and grains, and their sweet, umami-rich character after cooking complements both delicate and robust flavors.