Korean
Boil the noodles for 6 minutes, drain, rinse in cold water and cut them into 15 cm lengths with scissors.
Toss the beef with 2 tsp of the soy sauce, 1 tsp of the sugar, 1 tsp of the sesame oil and half the garlic.
Blanch the spinach for 30 seconds, cool it in cold water, squeeze it dry and toss it with 1 tsp of the sesame oil.
Beat the egg, cook it as a thin omelette in a lightly oiled pan and cut it into thin strips.
In a little vegetable oil, stir-fry the onion, then the carrot, then the mushrooms with the green onions for 2-3 minutes each, and finally the beef for 3 minutes.
Stir-fry the noodles with the remaining soy sauce, sugar and garlic for 3 minutes, until they absorb the sauce.
Toss the noodles with the vegetables, beef, remaining sesame oil and the sesame seeds, and top with the egg strips.