Onion is a word used for multiple plants of the genus Allium. They are known in the people as “onions”, but this term commonly refers to the species Allium cepa or onion onion or onion onion and goat garlic (shalot) The onion is one of the oldest vegetables known to mankind. It is used as a supplement or spice in various recipes in almost all world cultures. It can be found in fresh, frozen, canned and dehydrated state, as well as in powder. This vegetable can be used in almost any type of food. Depending on the variety, the onion can be with a sharp or mild taste.