Cut the oatmeal rice cakes, fish cakes, and onions into bite-sized pieces.
Heat some cooking oil in a pan and sauté the onions.
Add the fish cake and stir-fry together.
Add the oatmeal rice cakes and water, then bring to a boil.
Season with gochujang (Korean chili paste), chili powder, and soy sauce, mixing well as it boils.
Once the rice cakes become soft, add green onions and the final seasonings, then mix well.
Finally, sprinkle sesame seeds on top to finish.