Cut off the roots of the enoki mushrooms and tear them into bite-sized pieces.
Slice the onion thinly.
Crack the eggs into a bowl and season with salt.
Heat cooking oil in a pan and stir-fry the onion and enoki mushrooms.
When the vegetables are cooked, pour in the beaten eggs and stir gently to scramble.
Place the enoki mushroom egg scramble on top of rice.
Add soy sauce or pepper to taste.