Wash the cabbage thoroughly and cut it into bite-sized pieces.
Julienne the carrot and onion as well.
Heat cooking oil in a pan over medium heat.
Add the onion and carrot first, and stir-fry for 1 minute.
Add the cabbage, then season with salt and pepper.
Stir-fry for 3–4 minutes until all the vegetables are just softened.
Transfer the finished stir-fried cabbage to a plate.