Cut the rice cakes and fish cakes into bite-sized pieces.
In a pan, add water, gochujang (Korean chili paste), sugar, soy sauce, and minced garlic, then bring to a boil.
Once the sauce starts boiling, add the rice cakes and cook for 5 minutes.
Add the fish cakes and green onion, then simmer for another 3 minutes.
Taste and adjust the seasoning, then finish.