Korean Cucumber Salad (Oi Muchim)

▢1 cucumber (Japanese, English, Persian, Pickling are all good) – about 1 1/2 cup sliced for 1 cucumber
▢1 Tbsp soy sauce (Jin Ganjang)
▢2 Tbsp rice vinegar
▢1 Tbsp sugar
▢1/2 tsp Korean red chili powder
▢1/4 tsp sesame seeds
▢2 green onions , chopped