half a small red onion
Red onions are rich in anthocyanin antioxidants, fiber, and vitamin C. They provide prebiotic compounds (inulin) that support gut health, with minimal caloric density.
About
Red onions (Allium cepa var. atropurpurea) are bulbous vegetables belonging to the allium family, characterized by deep magenta or burgundy papery outer layers and layered inner flesh ranging from pale pink to deep purple. Native to Central Asia and domesticated in the Mediterranean region, red onions contain anthocyanin pigments responsible for their distinctive coloring. The variety exhibits a sweeter, milder flavor profile compared to yellow or white onions, with less pungency when raw, though they develop a rich sweetness when cooked or caramelized. Common cultivars include 'Red Burgundy,' 'Red Pearl,' and 'Tropea' (an Italian heirloom).
Red onions are medium to small in size when mature, with a slightly flattened bulbous shape. They possess a crisp, juicy texture that softens considerably during cooking.
Culinary Uses
Red onions are valued raw in salads, slaws, sandwiches, and salsas where their vibrant color and mild sweetness enhance both visual appeal and flavor. They pickle readily, becoming tangy and slightly softer while retaining their color. When cooked—sautéed, roasted, or caramelized—red onions develop concentrated sweetness and tender texture, making them suitable for soups, stews, grain bowls, and relishes. They appear prominently in Mediterranean, Latin American, and Indian cuisines. Their thinness when halved and sliced makes them ideal for raw preparations; a half onion is commonly used in composed salads, taco fillings, or as a quick-cooking component in stir-fries and ceviche.