Press the tofu for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
Toss the tofu cubes with arrowroot powder in a medium bowl until they are thoroughly 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 skillet and sear for 8 minutes, turning frequently until every side is golden and crispy.
Remove the tofu from the pan and set aside, then add the broccoli, bell pepper, and edamame with a splash of water.
Steam the vegetables for 3 minutes until vibrant, then whisk the tamari, vinegar, ginger, garlic, and red pepper flakes in a small bowl.
Return the tofu to the skillet and pour the prepared sauce over the ingredients.
Sauté for 1 minute over medium heat until the glaze is thick, glossy, and coats everything perfectly.
Garnish the dish with sesame seeds and serve immediately while the tofu is at its crispiest.