Wash the perilla leaves thoroughly and slice them into thin strips.
Julienne the cucumber and carrot.
Mix soy milk and salt to make the cold broth.
Boil the somen noodles, then rinse under cold water and drain well.
Place the noodles in a bowl, pour over the cold soy milk broth, and top with the vegetables and perilla leaves.
Sprinkle with sesame seeds to finish.