onion — diced
Onions are a good source of vitamin C, manganese, and prebiotic fiber (inulin), with notable quantities of quercetin and other polyphenolic antioxidants that concentrate when the bulb is cooked.
About
The onion (Allium cepa) is a bulbous vegetable belonging to the Amaryllidaceae family, native to Central Asia and long cultivated throughout the world. The edible bulb consists of concentric layers of modified leaf bases containing sugars, volatile sulfur compounds, and water, with a papery outer skin. Major cultivars include yellow Spanish onions, sweet Vidalia varieties, pungent red onions, and milder white onions. Raw onions exhibit a sharp, pungent flavor due to volatile organosulfur compounds; cooking transforms these through caramelization and Maillard reactions, developing sweet, complex, savory notes.
Diced onion refers to the bulb cut into uniform small cubes, typically ¼-inch to ½-inch, maximizing surface area for even cooking and flavor distribution while reducing prep time.
Culinary Uses
Diced onions function as a foundational aromatic base (soffritto, mirepoix) across virtually all global cuisines, building savory depth in stocks, braises, soups, stews, sauces, and sautés. They are equally essential raw in salsas, chutneys, salads, and relishes, contributing crisp texture and pungent bite. In caramelized form, diced onions yield a sweet, jammy component for gratins, tarts, and deglazing applications. The uniform size ensures consistent cooking rates when sautéed as part of a flavor base or added to ground meat preparations.