Boil the jjolmyeon noodles in boiling water, then rinse with cold water.
Cut the fish cakes into bite-sized pieces and blanch lightly.
Julienne the onion, green onion, and carrot.
Heat oil in a pan, and stir-fry the onion, green onion, and carrot.
Add the fish cakes and stir-fry together.
Add the sauce (gochujang, soy sauce, sugar, minced garlic, chili powder, vinegar, sesame oil).
Add the jjolmyeon noodles and stir-fry until all ingredients and sauce are well mixed.
Serve in a bowl and finish with a sprinkle of sesame seeds.