Start by slicing the medium cucumber in half lengthwise. Use a spoon to scoop out the seeds and cut the cucumber into thin half-moon slices.

Sprinkle 1 teaspoon of salt evenly over the cucumber slices. Toss gently and let sit for about 10 minutes.

Gently squeeze the cucumber slices to remove any remaining liquid and return the slices to the bowl.

Sprinkle 2 teaspoons of sugar over the cucumber slices and toss gently to combine.

Pour 1 tablespoon of rice vinegar and 1 tablespoon of sesame oil over the cucumber mixture. Stir until evenly coated.

Add 1 tablespoon of soy sauce and 1 clove of minced garlic. Stir well to combine.

Sprinkle 1 teaspoon of sesame seeds over the top of the salad and gently toss.

Fold in 1 tablespoon of chopped green onion and mix gently.

Sprinkle ½ teaspoon of red pepper flakes on top and toss again.

Let the salad sit for about 5 minutes at room temperature before serving.