Boil somyeon noodles in boiling water, then rinse in cold water.
Drain the boiled somyeon noodles thoroughly.
Mash the tofu and lightly crush the cooked soybeans for preparation.
Finely shred perilla leaves, cucumber, and onion.
In a bowl, mix the mashed tofu, soybeans, soy sauce, vinegar, olive oil, minced garlic, and sesame oil to make the sauce.
Top the noodles with vegetables and sauce, then mix everything well.
Plate the noodles and sprinkle with black sesame seeds.