Rinse the rice cakes and dried noodles under running water to prepare.
Cut the fish cake, onion, and green onion into bite-sized pieces.
In a pan, mix together gochujang (Korean chili paste), gochugaru (chili powder), sugar, soy sauce, minced garlic, and water to make the sauce.
Add the rice cakes and dried noodles to the sauce and bring to a boil.
Add the fish cake, onion, and green onion, then simmer over medium heat.
Once all ingredients are cooked, transfer to a bowl and serve.