Cut the chicken breast into bite-sized pieces.
Slice cabbage, sweet potato, onion, and carrot thinly.
Put the chicken breast and vegetables in a bowl and season them with gochujang (Korean chili paste), soy sauce, minced garlic, pepper, and light sesame oil.
Place the chicken breast and vegetables in a pan and stir-fry over medium heat.
When the chicken and vegetables are cooked, add scallions and stir-fry once more to finish.