Onions are one of the oldest cultivated vegetables, originated in central Asia and later spread across the world. Since older time, onion was heavily used as both food and medical remedy. Onions were easy to grow on any kind of soil, any type of weather ecosystem, and were easy to store, dry, and preserve during winters. Commonly onions are available in three color varieties. Yellow or brown onions are full flavored and chosen for everyday use. The Red or Purple onion is a good choice for fresh use. White onions are sweet in flavor.
