This is silly. I’ve seen Indian street vendors do it the most efficient way. You tilt the knife with the front part down and the back maybe a quarter inch above the surface. That way as you slice the onion the little quarter inch holds it together as you turn it 90 degrees and make the perpendicular set of cuts.

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reddit_clone 4 days ago | parent [-]

Yep. I arrived at the same solution after trial and error.

	▲	abcd_f 3 days ago \| parent [-]
		It’s a natural convergence point for the technique if you want to avoid disproportionately large pieces that come from the sides.