Put dried Dangmyeon in cold water and leave it for 30 mins. Chop carrots, shiitake mushroom, and onion. Cut soaked tree ear mushroom into 4 pieces. Mix beef with soy sauce and leave it for 10 mins.
After cutting the roots of spinach and washing it, put a pinch of salt in boiling water and spinach. Blanch it a little bit and remove water. Put a pinch of salt and sesame oil to spinach and mix them.
Separate egg yolk and white and put a pinch of salt into it and mix. Make egg garnish and chop it.
Stir-fry onion, carrots, and tree ear mushroom in order, and lastly put beef and shiitake mushroom together and stir-fry with others.
Put Dangmyeon into boiling water and boil it for 3 mins. Blanch it with water and remove moisture. Put sauce and boiled Dangmyeon into a pan and stir-fry them for 2 mins in mid-heat. Cut them into pieces.
Put Dangmyeon, fried veggie, and sesame oil and mix them. Lastly, put egg garnish and mix it with other stuff. (You can add more sauce to it if you want.)
Put them on a plate and sprinkle sesame seeds. Enjoy!