Cut the tofu into bite-sized pieces.
Slice the onion and green onion thinly.
Cut the beef brisket into bite-sized pieces.
Stir-fry the beef brisket in a pot.
When the meat is cooked, add water and bring to a boil.
Dissolve doenjang (soybean paste) and minced garlic into the soup.
Add onion and tofu, and continue boiling.
Lastly, add green onion and boil for a little longer.