Wash vegetables such as zucchini, onion, carrot, and shiitake mushrooms thoroughly and dice them.
Mash the tofu into small pieces.
Pour water (or kelp broth) into a pot and bring to a boil.
Stir in soybean paste and gochujang.
Add the vegetables and tofu, then simmer over medium heat.
Add minced garlic for extra flavor.
Taste and, if needed, add a little more soybean paste.
Once most of the liquid has reduced, turn off the heat and transfer to a bowl.