Wash the cucumber thoroughly and slice it thinly, about 0.5cm thick.
Sprinkle salt evenly over the cucumber and mix well. Let it sit and marinate for 20 minutes.
Rinse the salted cucumber lightly in cold water, then squeeze out the excess water.
Add sugar, vinegar, and minced garlic, and mix well.
Finish by drizzling sesame oil and sprinkling sesame seeds on top.