Thinly slice the Cheongyang peppers and onion.
Make broth using anchovies and kelp.
Pour the broth into a pot and bring to a boil.
Add the sliced peppers and onion and continue boiling.
Add soybean paste and stir until dissolved, then simmer.
Add tofu and cook for another 3 minutes.
Finish by sprinkling chopped green onions.