Photo by Scot Nelson on Wikimedia Commons (CC0 1.0)

– medium onion

ProduceYear-round; onions are harvested in late summer and early fall but store exceptionally well for months in cool, dry conditions, ensuring availability throughout the year in most markets.

Onions are a good source of vitamin C, dietary fiber, and quercetin, a flavonoid antioxidant; they are low in calories and contain prebiotic compounds that support digestive health.

About

The onion (Allium cepa L.) is a bulbous perennial vegetable belonging to the Amaryllidaceae family, native to Central and South Asia but now cultivated worldwide. The edible portion is the underground bulb, composed of concentric layers of modified leaf bases containing sugars, water, and volatile sulfur compounds. Medium onions typically weigh between 150–250 grams and possess a papery dry skin that may range from golden-yellow to reddish-purple or white, depending on variety. The inner flesh is crisp and juicy, with a pungent, sharp flavor profile when raw that becomes mellow and sweet when cooked due to the breakdown and caramelization of sugars and the reduction of sulfur compounds.

Culinary Uses

Onions are fundamental aromatics in cuisines across the globe, serving as a base for countless sauces, soups, stews, and braises. They are used raw in salads, salsas, and relishes for their sharp bite, and cooked in various preparations: sautéed until translucent for depth, caramelized for natural sweetness, or roasted whole for mild, tender results. Medium onions are ideal for dicing, slicing, and quartering in both raw and cooked applications. Common dishes include French onion soup, soffritto (Italian), mirepoix (French), and serving as the foundational layer in risottos, curries, and stir-fries across Asian cuisines.

Forms & Preparations

Diced — Cut into ¼–½ inch cubes; the standard cut for soffritto, mirepoix, and most cooked applications.
Sliced — Cut vertically into thin crescents; used for caramelized onions, grilling, and layering in dishes like French onion soup.
Minced — Finely chopped into small pieces; ideal for dishes where the onion should dissolve or integrate seamlessly into a sauce or paste.
Whole or halved — Left intact or split lengthwise; used for roasting, stuffing, or as part of a braising aromatics bundle.
Caramelized — Slowly cooked over low heat for 30–45 minutes until deep golden-brown; develops concentrated sweetness and complexity for use in soups, tarts, or as a topping.
Pickled — Raw or briefly cooked slices preserved in vinegar and spices; adds acidic, tangy notes to tacos, sandwiches, and composed dishes.