Onions are versatile vegetables with layers of flavor. They belong to the Allium genus and come in various types, including red, yellow, and white. Widely used in cooking worldwide, onions add depth and aroma to dishes, whether raw, sautéed, grilled, or caramelized. Rich in antioxidants and nutrients like vitamin C and fiber, onions offer numerous health benefits. Their distinctive pungent taste can range from sharp and spicy to sweet and mild, depending on the variety and preparation method.