Cut the onion, carrot, and cabbage into bite-sized pieces.
Boil the pasta noodles and drain the water.
Add cooking oil to a pan and stir-fry the pork.
Add the prepared vegetables and stir-fry together.
Add the boiled pasta noodles and mix well.
Add yakisoba sauce and soy sauce, then stir-fry.
Season with black pepper and serve on a plate.