Rinse the rice cakes in cold water to remove the starch.
Cut the chicken breast into bite-sized pieces.
Add olive oil to a pan and stir-fry the chicken breast.
Once the chicken is cooked, add the rice cakes, fish cake, onion, and cabbage, and stir-fry together.
Add water, low-sodium gochujang, chili powder, and soy sauce, then bring to a boil.
When the sauce thickens slightly, add green onion and simmer once more.
Serve the completed tteokbokki in a bowl.