Soak the rice cakes in water for about 10 minutes to soften them.
Make the sauce (gochujang, gochugaru, soy sauce, oligosaccharide, minced garlic, water).
Bring the sauce and water to a boil in a pan.
Once it starts boiling, add the soaked rice cakes, fish cake, cabbage, onion, and carrot.
Simmer on medium-low heat for 5–10 minutes until the ingredients are cooked.
Add chopped green onion and season with pepper.
Top with low-sodium cheese, simmer once more, and serve.