Prepare the vegetables. Set aside.
Slice the beef and season with 1 tablespoon soy sauce. Set aside.
Combine soy sauce, sesame oil, oyster sauce, sesame seeds, and sugar. Set aside.
In a pot, boil water. Once itโs boiling, add the noodles for 6 minutes.
Drain the noodles, wash them with cold water, then leave to drain again.
In the same pan, place it on high heat. With a bit of oil, stir-fry the garlic and beef.
When the beef is 70% done, add the vegetables. Add the onions, carrots, and mushroom first and cook for a minute, then add the rest of the vegetables and saute for a couple of minutes. Season it with salt and pepper and do not overcook it!
Add the noodles, half cup of water, and the sauce and mix thoroughly for 4 minutes.
Once everything is cooked and the sauce is absorbed by the noodles, move japchae to a plate and garnish with sesame seeds.
Serve and enjoy!