When buying onions, choose those that are heavy for their size with dry, papery skins with no signs of spotting or moistness. Avoid onions with soft spots. Humidity breeds spoilage in dry onions. Once cut, an onion should be tightly wrapped, refrigerated and used within 4 days. Freezing the onion for 20 minutes before chop-ping helps, but then so does wearing safety goggles.
Onions contain a fair amount of vitamin C with traces of other vitamins and minerals.
It is used as a seasoning. My preference is granulated onion. Used to denote that a tequila has spent some time in contact with wood. Often used to describe a tequila stored in either a barrel or vat and where specifying either isn't important. A local Hawaiian favorite, especially around the holidays.