Cut the tofu into bite-sized pieces.
Finely chop the onion, zucchini, and spicy green chili pepper.
Heat sesame oil in a pan and sauté the chopped vegetables.
Add soybean paste and gochujang (Korean chili paste) and stir-fry together.
Pour in water or kelp broth and bring to a boil.
Add the tofu and let it simmer again.
Finally, add minced garlic and green onion and bring to a gentle boil one more time.