I use onions in almost every dish, even if it’s just for a salad. They are my favorite veggie after all.
So it’s crucial that I know how to slice and dice one properly. The easy way of slicing the onion (cutting off both ends, slicing it in half then going at it) provides uneven slices and lots of crying (because of the sulfur, not because of your uneven slices.)
But one of my chef crushes, Gordon Ramsay, has a video that can explain how easy it is to dice up an onion and how it will keep you tear free (hint: it has to do with the root!)
Watch. Enjoy. Fall in love with Gordon and his fake crying at the end.
For the Love of Food 
This is a handy tip I always have to stop midway through chopping an onion because I can’t even see anymore thru my tears!
Wow! Thank you so much for sharing this! I love onions too, and was trying to train myself not to get too close while cutting it. Now I know, it’s the “evil” onion root.
I just absolutely loved this tutorial! I love to cook but it’s amazing how many basics I don’t know. I chopped a red onion before work this morning for my lunch (at 4:30AM!) and was so happy to be able to do so quickly and without making a mess of my mascara! Thanks for posting this!