Steps
1. Slice the cucumber into thin rounds. Sprinkle with salt and let sit for 15 minutes to draw out moisture.
2. Rinse the cucumber with cold water and drain well.
3. In a bowl, mix chili flakes, sugar, garlic, fish sauce, and rice vinegar to form a spicy paste.
4. Toss cucumbers and green onion with the spicy paste until evenly coated.
5. Let it sit for 20 minutes at room temperature before serving to blend flavors.