Onion

Onion is the most widely cultivated species of the genus Allium. Onion is most frequently a biennial, although it can also be a triennial or a perennial. Onions are cultivated and used around the world. As a food item, they are usually served cooked, as a vegetable or part of a prepared savory dish, but can also be eaten raw or used to make pickles or chutneys. Onions are often chopped and used as an ingredient in various hearty warm dishes, and may also used as a main ingredient in their own right. Common onions are normally available in three colours: yellow, red, and white.