one half onion

ProduceYear-round, with peak harvest and sweetness from late summer through fall, though storage onions remain available throughout winter and spring in most markets.

Low in calories but rich in vitamin C, dietary fiber, and quercetin, a polyphenolic antioxidant with potential anti-inflammatory properties. Contains prebiotic compounds that support gut 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 portion is the underground bulb, composed of concentric layers of fleshy, modified leaf bases enclosed in papery outer skins that range in color from yellow, white, to deep purple depending on variety. Onions possess a pungent, sulfurous aroma when raw due to volatile compounds released upon cutting, which mellows to a sweet, caramelized flavor when cooked. Common varieties include yellow onions (most versatile), sweet onions (Vidalia, Maui), and red onions (milder, visually striking).

Culinary Uses

Onions serve as a foundational aromatic in countless cuisines, whether raw, sautéed, caramelized, roasted, or pickled. They are essential to mirepoix and soffritto bases that begin soups, stews, and sauces across European, Mediterranean, and Asian cooking. Raw onions appear in salads, salsas, and as garnishes; caramelized onions become sweet and jammy for French onion soup or burger toppings; roasted or grilled onions serve as side dishes; and pickled onions add acidity and crunch to tacos and sandwiches. Onion layers can also be battered and fried, or the whole onion roasted until tender.

Forms & Preparations

  • Whole bulb — Papery skin intact, roasted or grilled whole or halved.
  • Sliced — Cut into rings or half-moons; used raw in salads or caramelized for depth of flavor.
  • Diced — Cut into small cubes; standard form for sautéing as an aromatic base.
  • Minced — Finely chopped to distribute flavor evenly throughout dishes like salsas or ground meat mixtures.
  • Pickled — Preserved in vinegar and spices; served as a condiment with preserved acidity and crunch.
  • Caramelized — Slowly cooked over low heat until deeply browned and sweet; concentrated umami flavor.

Substitutes

  • Unknown — Milder, slightly sweeter flavor; use in equal volume for a more delicate result, or reduce quantity for less intensity.
  • Unknown — Milder and slightly sweet; substitute in equal volume for cooked applications where raw pungency is undesired.
  • Unknown — Much more pungent; use sparingly (1/4 to 1/3 the volume) as a flavor accent rather than a one-to-one replacement.
  • Unknown — Milder and fresher; best for raw applications or as garnish; use 2-3 times the volume to approximate onion quantity.