Boil the kalguksu noodles and rinse them in cold water.
Julienne cucumber, carrot, and perilla leaves and prepare them.
Make the sauce (mix gochujang, red pepper powder, soy sauce, vinegar, sugar, minced garlic, sesame oil, sesame seeds).
Add the vegetables and sauce to the noodles and mix well.
Serve with a boiled egg and seaweed flakes on top.