Clean the enoki mushrooms thoroughly and trim the stem ends.
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, minced garlic, and pepper.
Serve the stir-fried enoki mushrooms over rice and garnish with chopped green onions.