Photo by Scot Nelson on Wikimedia Commons (CC0 1.0)

dice onions

ProduceYear-round. Fresh onions are harvested in late summer and early fall, with peak availability from August through October; stored onions remain widely available throughout the year.

Onions are a good source of vitamin C, dietary fiber, and prebiotic compounds (particularly inulin). They contain quercetin and other polyphenols with antioxidant and anti-inflammatory properties.

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 bulb consists of concentric layers of fleshy leaf bases that form a papery exterior skin, ranging in color from white, yellow, and red depending on variety. The flavor profile varies from sharp and pungent (raw) to sweet and mellow (when cooked), due to sulfur-containing compounds that break down with heat. Common varieties include yellow onions (the most versatile cooking variety), sweet varieties such as Vidalia and Walla Walla, red onions (higher in anthocyanins), and white onions (common in Mexican and Asian cuisines).

Culinary Uses

Diced onions form the aromatic foundation (mirepoix/soffritto) of countless cuisines, sautéed as a base for soups, stews, braises, and sauces. Raw diced onions appear in salsas, salads, sandwiches, and ceviche, providing sharp bite. Yellow onions are the standard for everyday cooking due to their balanced flavor and ability to caramelize; red onions are preferred raw for their mild sweetness and visual appeal; sweet varieties suit grilling and raw preparations. Diced onions are typically sweated gently in fat to develop sweetness and soften their cellular structure before adding other ingredients.

Forms & Preparations

Diced — Cut into small, uniform cubes (typically ¼-inch); the standard preparation for cooking bases, salsas, and toppings.
Sliced — Thin or thick rings or half-moons; used for caramelizing, frying, and raw applications such as sandwiches and salads.
Minced — Finely chopped into small pieces; used in pastes, meat mixtures, and dishes requiring rapid incorporation and even cooking.
Caramelized — Long-cooked sliced or diced onions that develop deep color and concentrated sweetness; used in soups, gratins, and as a condiment.
Pickled — Sliced or diced onions preserved in vinegar and salt; used as a condiment, topping, and ingredient in ceviche and other applications.
Powdered/Dehydrated — Dried and ground into a fine powder; used in spice blends, rubs, and as a shelf-stable seasoning.