red bunion diced into small cubes
Red onions are a good source of vitamin C, dietary fiber, and quercetin, a flavonoid antioxidant particularly abundant in the outer layers and red pigmentation. They are naturally low in calories (approximately 40 per 100g raw) and contain prebiotic compounds that support gut health.
About
The red onion (Allium cepa var. aggregatum or red cultivars of A. cepa) is a bulbous vegetable belonging to the allium family, native to Central Asia and the Mediterranean region. Red onions are characterized by deep purple-red papery outer skin and layers of red-tinged white flesh, with a color intensity that varies by cultivar. The pigmentation derives from anthocyanin compounds, the same class of polyphenols found in red wine and berries. Red onions possess a sharper, more pungent bite than yellow onions when raw, which mellows considerably with cooking, developing a sweeter character as their natural sugars caramelize.
Culinary Uses
Diced red onions serve multiple roles in global cuisine, from raw applications in salsas, salads, and pickles—where their color and assertive flavor provide visual and gustatory impact—to cooked preparations including caramelizing, roasting, and braising. The diced form is particularly versatile in Latin American cuisine (pico de gallo, ceviches), Mediterranean dishes, Indian curries, and Middle Eastern mezze. When diced finely, raw red onions pair well with acidic components (lime juice, vinegar) that temper their sharpness; when cooked slowly, they become tender and mellow, lending body and natural sweetness to stocks, braises, and sauces.