Step 1

Thinly slice cucumbers.

Step 2

Peel carrots, and thinly slice.

Step 3

Put cucumbers and carrots into a colander and toss with salt. Let sit and drain in the sink for 30 minutes.

Step 4

While cucumbers and carrots are draining, peel onion and slice into thin half-moons.

Step 5

After 30 minutes, use paper towels or a clean kitchen towel to blot cucumbers and carrots dry and press out any excess liquid.

Step 6

Pour carrots and cucumbers into a large bowl and stir in red onion slices.

Step 7

Then stir in vinegar, sugar, and sesame oil.

Step 8

Cover and put in the refrigerator to chill for 2 hours, stirring occasionally.

Step 9

Stir in sesame seeds before serving.