Step 1

Using a very sharp knife, cut off both ends of onions and discard.

Step 2

Cut the onion in half, lengthwise, following the vertical lines of the onion. Peel the outermost layer of skin (the papery part) and discard.

Step 3

Place the flat end of one half of the onion (the cut side of the onion) face down onto the cutting board.

Step 4

Slice the onion at an angle, starting at one end, all the way to the middle portion and set sliced pieces aside.

Step 5

Turn the onion around, and starting at the opposite end, slice it again at an angle, until you reach the center of the onion.

Step 6

Repeat the slicing technique for the other half of the onion and use the slices for fajitas or other dishes that call for long strips of onion.