mragin's Profile

I agree with @joyosity. It's easier to make the horizontal cuts first since those are the most awkward and the onion is still "together" at that point.

Also, Alton Brown recommended forgoing the horizontal and vertical cuts and instead making angled cuts like a clock with the tip of your knife pointed toward the root.
Then dice toward the root, perpendicular to your angled cuts. That reduces the number of total cuts you make and gives you essentially the same result. Better (and safer) than making the horizontal cuts toward your hand!

Sorry, I can't find a video of this!