Prep the vegetables – Cut the zucchini, mushrooms, carrot, onion, bok choy, and radishes into medium-small pieces. Separate the white and green parts of the green onion, and set aside the bok choy leaves together with the green onion tops for later. Grate the ginger and garlic (if using).
Prepare the tofu – Cut the firm tofu into cubes. The silken tofu can be cut into large pieces now or added whole and gently divided into large pieces in the pan later.
Arrange the ingredients – In a deep pan or shallow pot, drizzle in a little sesame oil (optional). Arrange the onion, carrot, zucchini, mushrooms, radishes, grated ginger, grated garlic (if using), firm tofu, and frozen edamame in an even layer, packing everything closely together.
Optional: Turn on the heat so the pot warms up while you prepare the broth.
Make the broth – In a large measuring jug or bowl, whisk together the soy sauce, gochugaru (if using), gochujang (if using), rice vinegar, lime juice, coconut sugar, and boiling water until well combined.