Cut the soft tofu and vegetables into bite-sized pieces.
Prepare the perilla seed powder.
Make a broth by adding water and kelp to a pot.
Once the broth boils, remove the kelp and add mushrooms, zucchini, and green onion.
Add the prepared soft tofu and bring to a boil.
Season with perilla seed powder, soy sauce for soup, and salt.
Mix everything well and let it simmer.
Finish by adding a small amount of perilla oil.