Fish cakes are already quite salty, so it's good to rinse them under running water to reduce both their salty and sweet flavors.
Cut the fish cakes into bite-sized pieces.
Julienne the onion, carrot, and green onion.
Heat cooking oil in a pan and stir-fry the fish cakes.
Add the onion and carrot, and stir-fry together.
Add gochujang (Korean chili paste), soy sauce, sugar, minced garlic, and red pepper powder for seasoning.
Stir-fry until all the ingredients are cooked through.
Add green onion and sesame oil to finish.