Rinse the rice cakes under running water.
Cut the fish cakes and vegetables (onion, green onion, carrot) into bite-sized pieces.
Pour 200ml of water into a pan and bring to a boil.
Add gochujang, red pepper flakes, soy sauce, and sugar/stevia to make the sauce.
Once the sauce boils, add the rice cakes, fish cakes, and vegetables, then simmer for 5-10 minutes.
Top with green onions at the end to finish.