Wash the napa cabbage thoroughly and cut into bite-sized pieces.
Dice the tofu and slice the green onion thinly.
Pour water into a pot and dissolve the soybean paste. Bring to a boil.
Once the doenjang broth is boiling, add the napa cabbage and simmer for 5 minutes.
Add tofu and minced garlic, and boil for a little longer.
Add green onion, then season with salt and pepper.