Juicing an Onion

I wanted to make crab dip for Thanksgiving. I found a highly rated recipe on line and  purchased all the ingredients. When I started to make the dip, the recipe said, "collect the juice from an onion".

I admit I am not a chef, but had never heard of juicing an onion. Reading further, it said to grate an onion on the smallest grater hole and collect the juice. I followed the recipe and in 2 minutes, I was sobbing. If cutting an onion releases an odor, grating an onion is 100 times worse.I was crying so hard, that I could barely see to collect the onion juice.

Everyone seemed to enjoy the crab dip, so it seems my efforts were worthwhile.