Cut the fish cake into bite-sized pieces.
Slice the onion and green onion.
Heat cooking oil in a pan and sauté the onion and green onion.
Add gochujang (Korean red chili paste), red pepper powder, soy sauce, and minced garlic to make the seasoning sauce.
Add the fish cake and stir-fry with the sauce.
Pour in 100ml of water and simmer.
Finish by sprinkling pepper on top.