Soak the rice cakes in warm water for 10-20 minutes to soften.
In a large pan, combine water, gochujang, gochugaru, sugar, and soy sauce.
Bring the mixture to a simmer over medium heat.
Add the softened rice cakes to the pan and stir well.
Cook for about 5 minutes, allowing the sauce to thicken.
Add the fish cakes and stir to combine.
Continue cooking for an additional 5-7 minutes, stirring occasionally.
Once the sauce is thickened, remove from heat.
Garnish with chopped green onions and sesame seeds.
If desired, add boiled eggs for extra flavor.