Cut the chicken into bite-sized pieces.
Slice the cabbage, sweet potato, green onion, and onion into chunks.
In a bowl, mix chili powder, soy sauce, gochujang (red chili paste), sugar, minced garlic, and pepper to make the sauce.
Combine the chicken and the sauce and marinate for 10 minutes.
Heat some cooking oil in a pan and stir-fry the marinated chicken.
When the chicken is halfway cooked, add the vegetables and rice cakes and stir-fry together.
Once all ingredients are cooked, serve and enjoy.