Onions are by far my favorite vegetable.
same, very good on everything
It is really closely related to the shallot and garlic.
oh those are very good too
Onion
The onion ("Allium cepa" L., from Latin "cepa" "onion"), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus "Allium". Its close relatives include the garlic, shallot, leek, chive, and Chinese onion.
This genus also contains several other species variously referred to as onions and cultivated for food, such as the Japanese bunching onion ("Allium fistulosum"), the tree onion (
bulb. These leaves are used as a vegetable; they are eaten either raw or cooked. The leaves are often chopped into other dishes, in the manner of onions or garlic. 
Etymology.
The words "scallion" and "shallot" are related and can be traced back to the Greek "ασκολόνιον" ('askolonion') as described by the Greek writer Theophrastus. This name, in turn, seems to originate from the name of the ancient Canaan city of Ashkelon. The plant itself came from farther