Wash the tomatoes thoroughly and cut them into bite-sized pieces.
Thinly slice the onion and green onion.
Boil the noodles in boiling water, then rinse under cold water.
Add olive oil to a pan and sauté the onion and green onion.
Add the tomatoes and cook them lightly, then add soy sauce and water to make the broth.
When the broth starts boiling, add the cooked noodles and mix well.
Finish by sprinkling pepper and sesame oil to taste.