Boil the wheat noodles and rinse them in cold water.
Slice cucumber and carrot into thin strips.
Chop perilla leaves finely.
In a bowl, add the boiled noodles, cucumber, carrot, and perilla leaves.
Add perilla seed powder, soy sauce, gochujang (Korean red chili paste), minced garlic, sesame oil, and vinegar, then mix well.
Transfer to a serving bowl and sprinkle sesame seeds on top to finish.