Photo by Scot Nelson on Wikimedia Commons (CC0 1.0)

qt. chopped onions

ProduceYear-round. Onions are harvested in late summer and early fall but store exceptionally well in cool, dry conditions, making them available throughout the year in most markets.

Low in calories but rich in vitamin C, fiber, and antioxidants including quercetin. Contain prebiotic inulin, which supports digestive health.

About

The onion (Allium cepa) is a bulbous plant native to Central Asia, belonging to the Amaryllidaceae family alongside garlic, leeks, and shallots. The edible portion is the papery-skinned bulb composed of concentric layers of fleshy, starch-rich leaf bases with a pungent, sulfurous flavor. Common varieties include yellow onions (the standard all-purpose cooking onion), white onions (milder and crisper), red onions (sweeter with a distinct purple hue), and sweet onions such as Vidalia or Walla Walla. The flavor transforms dramatically with cooking: raw onions deliver a sharp, acrid bite due to volatile sulfur compounds, while prolonged heating converts these compounds into sweet, caramelized flavors through the Maillard reaction.

Culinary Uses

Onions serve as a foundational aromatic in countless cuisines worldwide, forming the flavor base (soffritto, mirepoix, holy trinity) for soups, stews, braises, and sauces. They are equally valuable raw in salads and salsas, caramelized as a side dish or topping, or pickled for condiments. Yellow onions are preferred for cooking due to their balance of sweetness and structure; red onions are favored raw or for pickling; white onions appear frequently in Latin American and Asian cuisines. Chopped onions integrate quickly into dishes, releasing their juices and flavoring evenly throughout.

Forms & Preparations

Chopped — Cut into roughly 1/4-inch pieces for even, quick cooking and even flavor distribution throughout a dish.
Diced — Cut into small 1/8-inch cubes for fine texture and rapid incorporation, often used in salsas and garnishes.
Sliced — Cut into thin rings or half-moons, ideal for caramelizing, grilling, or raw applications.
Minced — Finely chopped or processed into near-paste form for maximum surface area and flavor integration in dressings and marinades.
Whole or halved — Left intact or cut in half for roasting, braising whole onions, or slow-cooking in stews where structure is maintained.
Caramelized — Slowly cooked in fat over low heat until deeply browned and sweet, producing concentrated flavor for soups, burgers, and garnishes.