Anyone who has ever tried to peel and slice an onion knows that it's quite a challenge—especially for the eyes. Discover effective tricks to remedy this and learn how to peel an onion quickly.

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This handheld slicer from Microplane had big safety issues off the bat—the julienne blade attachment consistently dislodged from the back of the mandoline when slicing food with the V-shaped blade.

Then, make parallel cuts from stem to root, always keeping the root intact. Then, cut the onion across in parallel lines to create the dice. To Slice: Cut the onion in half from root end to tip. Peel ...