Cut the chicken into bite-sized pieces.
Slice the cabbage, sweet potato, green onion, and onion into easy-to-eat pieces.
Prepare the seasoning sauce by mixing gochujang, red pepper flakes, soy sauce, sugar, minced garlic, and other ingredients.
Add the sauce to the chicken and marinate for 10 minutes.
Heat cooking oil in a pan and stir-fry the chicken.
Add the prepared vegetables and rice cakes, then stir-fry together.
Continue to stir-fry over medium heat until the ingredients are fully cooked.