The onion also known as the bulb onion , is a vegetable that is the most widely cultivated species of the genus Allium. As a food item, they are usually served cooked, as a vegetable or part of a prepared savoury dish, but can also be eaten raw or used to make chutneys. Most onion cultivars are about 89% water, 9% carbohydrates , 1% protein, and negligible fat.
