Coarsely mash the ground soybeans.
Prepare zucchini, tofu, onion, green onion, and garlic.
Add perilla oil to a pot and stir-fry the green onion and garlic.
Add onion and zucchini and sauté.
Add the ground soybeans and water and bring to a boil.
Add tofu and simmer until slightly thickened.
Season with soybean paste and salt.
Add green onion, finish simmering, and serve.