Cut off the root base of the enoki mushrooms and separate them into bite-sized pieces.
Slice the green onion thinly.
Make the sauce by mixing soy sauce, sugar, minced garlic, sesame oil, chili powder, and water.
Heat some cooking oil in a pan and sauté the green onion until fragrant.
Add the enoki mushrooms to the pan and pour in the sauce.
Simmer over medium heat until the sauce reduces and coats the mushrooms.
Transfer to a plate, sprinkle with sesame seeds, and serve.