The classic technique of making a series of horizontal slices across an onion intimidates some people. That’s why there is the Onion Cheat. This was referred to as the Quarter Roll Trick in the book because you start with an onion quarter rather than a half. It’s a little slower than the classic technique but for home prep no one will know the difference.
As always, cut the stem end off the onion, leaving the root intact. The root will hold everything together and keep your onion pieces from skittering all over the cutting board. Turn the onion onto its now flat stem end and cut in half through the root, then peel. Cut each half into quarters, again from root to stem.