Remove the tofu from its packaging and press between paper towels for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
Place the tofu cubes in a bowl and toss with arrowroot powder until each piece is lightly and evenly coated.
In a small jar or bowl, whisk together the tamari, rice vinegar, grated ginger, minced garlic, and red pepper flakes to create the stir-fry sauce.
Heat the toasted sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the tofu to the skillet in a single layer and sear for 8-10 minutes, turning occasionally, until all sides are golden brown and crispy.
Add the broccoli florets, sliced red bell pepper, and shelled edamame to the skillet with the tofu.
Stir-fry the vegetables for 3-5 minutes until they are tender-crisp and vibrant in color.
Pour the prepared sauce over the mixture and toss constantly for 1 minute until the sauce thickens and coats the tofu and vegetables.
Remove from heat and garnish with sesame seeds before serving immediately.