1Thinly slice the 2 large cucumbers and place them in a large bowl.
Add 2 tablespoons of gochugaru (Korean red pepper flakes) to the bowl.
Pour in 1 tablespoon of soy sauce, 1 tablespoon of rice vinegar, and 1 tablespoon of sesame oil.
Mince 2 cloves of garlic and add them to the bowl.
Add 1 teaspoon of sugar to the mixture.
Chop 2 green onions and add them to the bowl.
Sprinkle 1 tablespoon of sesame seeds over the salad.
Mix all the ingredients thoroughly until the cucumbers are evenly coated with the dressing.
Let the salad sit for at least 10 minutes to allow the flavors to meld.
Serve immediately or refrigerate for later use.