Cut the chicken and vegetables into bite-sized pieces.
Marinate the chicken with gochujang (Korean chili paste), soy sauce, garlic, and sesame oil.
Heat oil in a pan and sauté the onion and green onion.
Add the marinated chicken and stir-fry over high heat.
Once the chicken is cooked, add carrots, cabbage, and other vegetables and stir-fry together.
Taste and adjust the flavor with salt and pepper to your preference.