Not a diet meal
Cut cheonggukjang (fermented soybean paste), tofu, zucchini, and potatoes into bite-sized pieces.
Pour water into a pot and make broth with anchovies and kelp.
Add potatoes, zucchini, and onion to the broth and bring to a boil.
When the vegetables are mostly cooked, add tofu and cheonggukjang.
Add minced garlic, chili peppers, and green onions and simmer a bit more.
Taste and season with salt or soup soy sauce as needed.