"Family Secret Revealed... This authentic recipe comes from a southern province of Japan, and has been passed down for generations. Our family loves to eat this meal every Sunday for brunch. Healthy comfort food! Try it and you will love it too! Serve over hot white rice."
In a dry heavy skillet over medium heat, stir the sesame seeds and dried sardines until they give off their fragrance but don't burn, about 2 minutes. Place the sesame seeds and dried sardines in the work bowl of a small food processor, and pulse until ground to a fine powder.
Place the dried sardine mixture in a large bowl, and stir in the miso to make a very thick paste. Add boiling water and mix to a smooth, creamy consistency, and gently stir in the cubed tofu, green onions, and red pepper flakes.