Cut Cheonggukjang and tofu into bite-sized pieces.
Prepare vegetables such as zucchini, potato, onion, and green onion.
Boil water in a pot and add potato, zucchini, and onion. Let them cook.
When the vegetables are cooked, add Cheonggukjang and stir to dissolve.
Add tofu, green onion, and garlic, then boil for a moment longer.
Season with salt or soup soy sauce to taste.