Wrap enoki mushrooms with thinly sliced beef.
Mix soy sauce, sake, sugar, chicken powder, salt, and pepper in a bowl.
Whisk eggs in a separate bowl and set aside.
Heat a pan with a drizzle of oil, then sauté sliced onions until soft.
Place beef-wrapped enoki mushrooms on top of the onions.
Pour in the sauce, cover, and let cook for about 3 minutes.
Remove the lid, then pour in the egg mixture.
Cook for another 3-5 minutes, or until the eggs are fully set.
Serve & enjoy!