Wash the cucumber thoroughly and slice it thinly.
Sprinkle with salt and let it sit for 10 minutes, then squeeze out the moisture.
Add soy sauce, red pepper powder, minced garlic, vinegar, sugar, sesame oil, and sesame seeds, and mix well.
Add the cucumber and toss until evenly coated with the seasoning.
Transfer to a plate and sprinkle with sesame seeds to finish.