Put all these together with the remaining ingredients from the leftover Worcester sauce, soy sauce, oyster sauce, and ketchup, in a small bowl. Ready to be served.
Take a large wok or frying pan. Heat 1 tablespoon of oil. Brown the slices of pork belly in it over a medium level of heat. Set aside
Cook noodles 1 minute less than package instructions. Rinse with cold water.
Add final tablespoon of oil to pan. Add sliced onion and cabbage. Stir-fry 2-3 minutes until vegetables are tender but yet crunch. And then add the noodles to the pan
Pile fried pork belly in the pan; Pour over noodles the sauce that has been well mixed; Stir fry for 2-3 minutes so that the sauce would cling nice to the noodles caramelizing a little.
Transferring or scooping yakisoba portions to individual plating. Using benishoga, aonori powder and dried bonito flakes garnished. Serve with the hot one.