Remove excess water from the tofu with a kitchen towel and cut it into bite-sized pieces.
Finely chop the onion, green onion, and chili pepper.
In a bowl, mix together doenjang, gochujang, the chopped ingredients, minced garlic, sesame oil, toasted sesame seeds, and water.
Season to taste with low-sodium soy sauce.
Serve by topping the tofu with the prepared ssamjang.