Press the extra firm tofu for at least 20 minutes to remove excess moisture, then cut into 1-inch cubes.
In a medium bowl, toss the tofu cubes with arrowroot powder, sea salt, and black pepper until each piece is lightly and evenly coated.
Heat the toasted sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the tofu to the hot skillet and sear, turning occasionally, until all sides are golden brown and crispy, about 8 to 10 minutes.
Transfer the crispy tofu to a plate and set aside.
Add the broccoli florets, sliced bell peppers, and shelled edamame to the same skillet with two tablespoons of water; cover and steam for 3 minutes until tender-crisp.
Remove the lid and stir in the minced garlic and ginger, sautéing for 1 minute until fragrant.
Return the tofu to the skillet and drizzle with tamari, tossing gently for 1 minute to ensure everything is coated in the glaze.
Remove from heat, garnish with toasted sesame seeds, and serve immediately.