Cut the chicken breast into bite-sized pieces.
Slice the cabbage, onion, carrot, and green onion into eatable sizes.
Mix low-sugar gochujang (Korean red chili paste), soy sauce, minced garlic, erythritol, and pepper to make the sauce.
Combine the chicken breast and sauce in a bowl. Marinate for 10 minutes.
Add the marinated chicken and prepared vegetables to a pan and stir-fry over medium heat.
Cook until all ingredients are done, then serve on a plate.