Trim the root ends of the enoki mushrooms and clean them thoroughly.
Thinly slice the onion and carrot.
Heat cooking oil in a pan and stir-fry the onion and carrot.
Add the enoki mushrooms and stir-fry together.
Season with soy sauce, sugar, and pepper to taste.
Place the stir-fried enoki mushrooms on top of cooked rice.
Drizzle with sesame oil and sprinkle with sesame seeds to finish.