Dice the tofu and set aside.
Finely chop zucchini, onion, and green onion.
Pour anchovy broth into a pot and bring to a boil.
Add soybean paste and gochujang, stirring to dissolve.
Add the prepared vegetables and cook until tender.
Add the tofu and simmer together.
Adjust seasoning, reduce to low heat, and let it thicken.