Blanch the tofu noodles in boiling water for 1 minute, then rinse them in cold water and drain.
Julienne the cucumber and carrot; slice the green onion thinly.
In a bowl, combine the tofu noodles, vegetables, soy sauce, perilla oil, vinegar, and sesame seeds. Mix evenly.
Transfer to a serving bowl and garnish with seaweed flakes and extra sesame seeds.