Slice zucchini, onion, and green onion thinly.
Boil water in a pot.
Dissolve the soybean paste and stir well.
Add the chopped vegetables and tofu, then bring to a boil.
Cook the noodles and rinse them in cold water.
Place the noodles in a bowl and pour over the soybean broth.
Sprinkle chili powder and sesame oil to taste.