onion or 2 small onions
Onions provide vitamin C, dietary fiber, and quercetin, a flavonoid with antioxidant and anti-inflammatory properties. They are very low in calories (approximately 40 per 100g) and contain prebiotic compounds that support gut health.
About
The onion (Allium cepa) is a herbaceous biennial bulb native to Central Asia that has become a foundational ingredient in cuisines worldwide. The edible bulb consists of concentric layers of fleshy, modified leaves that range in color from pale yellow, white, or red depending on variety, with a papery outer skin. Onions possess a pungent, complex flavor profile that transforms dramatically with cooking: raw onions deliver sharp, sulfurous bite due to volatile compounds like thiopropional sulfoxide, while heat converts these compounds into sweet, caramelized notes. Major varieties include yellow onions (mild, all-purpose), sweet onions (Vidalia, Spanish, Texas 1015), red onions (sweeter, with anthocyanin pigments), and white onions (commonly used in Latin American cuisine).
Culinary Uses
Onions serve as an aromatic base in countless cuisines, providing depth and sweetness when caramelized, body when pureed, and sharp flavor when raw. They are essential to mirepoix (French), soffritto (Italian), and holy trinity (Creole) flavor foundations, and appear in dishes ranging from French onion soup and Indian curries to Thai stir-fries and Mexican salsas. Raw onions are sliced into salads, pickled as condiments, or served alongside grilled meats. Caramelization over low heat for 30-45 minutes brings out natural sugars, creating rich accompaniments for beef, cheese, and bread. Roasting, grilling, or stuffing whole onions intensifies their sweetness, while mincing and wilting them quickly provides aromatic volume without dominating other flavors.