Cut the onion in half from root to tip
Peel off the skin
Place one half cut-side down on the cutting board
Make vertical slices from the cut side toward the root, stopping short of the root
Make horizontal slices across the onion
Make crosswise slices downward to dice
Repeat with the other half
For rings: slice the onion into rounds, keeping the root intact
For wedges: cut the onion into quarters, then slice into wedges
