Rinse the konjac noodles under running water and drain thoroughly.
Cut the cabbage into bite-sized pieces.
Julienne the carrot and onion.
Heat cooking oil in a pan and stir-fry the onion, carrot, and cabbage.
When the vegetables have softened slightly, add the konjac noodles.
Season with soy sauce, oyster sauce, and black pepper to taste.
Once all ingredients are well mixed and cooked through, transfer to a plate.