White Bermuda onions.
Bermuda onion definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a large white or yellow onion with a mild flavor, grown in Texas, California, etc.
Bermuda onion definition by American Heritage Dictionary
Any of several varieties of mild-flavored onions shaped like a flattened sphere.