Wash the radish thoroughly, peel it, and slice it into thin strips.
Add salt to the sliced radish and let it sit for 10 minutes.
Squeeze the salted radish to remove excess moisture.
Mix chopped garlic, red pepper powder, sugar, vinegar, salt, chopped green onion, and sesame oil evenly with the radish.
Transfer the finished spicy radish salad to a serving dish.