Onions freeze up great! Then all I need to do is shake a little frozen onion in whatever I'm making and it's done. They are great for soups, casseroles, roasts, whatever I need that calls for onion.
And then all my tears are done at once. :o)
diced, thick sliced (for onion rings), thin sliced (for
French onion soup or sauteeing) and rough chopped