Moisten the frozen udon noodles and microwave for 2 to 3 minutes. You can boil the udon noodles instead of course.
In the meantime, stir fry the beef in a frying pan. It will change color in about 2 minutes. Add the burdock root and garlic shoots and season with salt and pepper.
Around the time the meat and vegetables are done, the microwaved noodles will be done too. Add the sauce that comes with a pack of natto and mix.
Pile the meat and vegetables on top of the udon noodles, add some yakiniku sauce and sesame seeds, and it's done.