yellow or white onions
Onions are low in calories but rich in vitamin C, manganese, and prebiotic fiber (particularly inulin). They contain quercetin and other polyphenolic compounds with anti-inflammatory and antioxidant properties.
About
Onions (Allium cepa) are bulbous vegetables in the amaryllis family, native to Central Asia and widely cultivated worldwide. Yellow and white onions are the two most common culinary varieties, differing primarily in their papery outer skin color and sugar content. Yellow onions have golden-brown outer layers and are slightly sweeter with more sulfur compounds, making them fuller-bodied in flavor. White onions possess pale, nearly translucent outer skin and a milder, more delicate taste with sharper undertones. Both types have concentric layers of fleshy leaves containing volatile oils and sulfur compounds that release pungent aromas when cut. The pungent odor and tears-inducing properties result from the enzyme alliinase breaking down sulfur amino acids, which intensifies when onions are raw and mellows significantly through cooking.
Culinary Uses
Yellow onions are the workhorse of Western cuisine, serving as the foundational aromatic in countless dishes including soups, stews, sauces, and stocks. Their natural sweetness intensifies with caramelization, making them ideal for French onion soup, grilled preparations, and roasted dishes. White onions, preferred in Latin American, Middle Eastern, and Asian cuisines, are often used raw in salsas, salads, and ceviche where their sharper, crisper quality is desired, though they also cook well in curries and sautéed preparations. Both varieties are essential for mirepoix and soffritto bases. Yellow onions are typically preferred for long, slow cooking; white onions for quick applications and raw consumption.