I have found that putting lemon juice on my cutting board before cutting an onion keeps me from tearing up while cutting. Just pour some on the board take your onion, cut in half and make sure to put your newly exposed ends into the lemon juice. Then just cut like you usually would!
I was watching tv viewing a cooking channel. He said if you cut the bottom of the onion off first it releases the gases and 'no more tears", believe me it works!
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