Press the extra firm tofu for 15 minutes between paper towels to remove excess moisture, then cut into 1-inch cubes.
In a small bowl, whisk together the tamari, rice vinegar, grated ginger, minced garlic, red pepper flakes, arrowroot powder, and water to create the stir-fry sauce.
Heat a large non-stick skillet over medium-high heat and add the toasted sesame oil.
Add the tofu cubes to the skillet and sear for 8-10 minutes, turning occasionally, until the edges are golden and crispy.
Toss in the broccoli florets, sliced red bell pepper, and shelled edamame, sautéing for 5 minutes until the vegetables are tender-crisp.
Pour the prepared sauce over the tofu and vegetables, stirring constantly for 1-2 minutes until the glaze thickens and coats everything evenly.
Remove from the heat and garnish with sesame seeds before serving hot.