Press your tofu: press your tofu for 30 minutes to remove most excess moisture. You can use a tofu press for this, or you can wrap your tofu in paper towels and place a somewhat heavy plate on top of it.
Crumble (or cube) your tofu: Once your tofu has been pressed, use your hands to tear pieces off and create "crumbles" of whatever size you prefer. If you prefer cubes rather than crumbles, you could instead cube your tofu with a knife. Once you have created your crumbles or cubes of tofu, place them in one layer in a shallow dish.
Make your marinade: In a separate small bowl, combine all other ingredients to make the marinade. Whisk together with a fork until there are no longer any chunks of miso paste and it is all mixed and relatively smooth.
Combine your tofu and marinade: Pour your marinade on top of the tofu in your shallow dish. Using a spatula, carefully move the tofu around a bit to make sure that it is evenly coated in the marinade. The tofu should not be "swimming" in a giant pool of the marinade - this is intended to be just enough to coat the tofu so that it can soak up all that yummy flavor!
Let sit/marinate: Let the tofu/marinade mixture sit in the fridge for at least 30 minutes. The longer it sits, the stronger the taste will be! You can also eat some right away if you're feeling impatient, but I personally think the 30 minutes is worth it!
Use this as a topping on whatever you'd like and store in the fridge!