Wash the cucumbers and slice them thinly, either into rounds or half-moons, depending on your preference.
Place the sliced cucumbers into a mixing bowl and sprinkle with salt. Toss gently to coat and let them sit for about 5 minutes to draw out some moisture.
In a separate bowl, whisk together the rice vinegar, soy sauce, gochugaru, sesame oil, sugar, and minced garlic until well combined.
After 5 minutes, drain any excess liquid from the cucumbers and add them to the bowl with the dressing.
Toss the cucumbers and dressing together until the cucumber slices are well coated.
Add the sliced green onions and toss again gently.
Transfer the salad to a serving dish and sprinkle with sesame seeds for garnish.
You can chill the salad in the refrigerator for about 10-15 minutes before serving to enhance the flavors.