Press tofu for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
In a small bowl, whisk together tamari, rice vinegar, minced ginger, minced garlic, red pepper flakes, and arrowroot powder.
Heat toasted sesame oil in a large non-stick skillet or wok over medium-high heat.
Add tofu cubes to the skillet and sear until golden brown and crispy on all sides, about 8-10 minutes.
Toss in the broccoli florets, sliced red bell pepper, and shelled edamame, sautéing for 4-5 minutes until vegetables are tender-crisp.
Pour the prepared sauce over the tofu and vegetables, stirring constantly for 1 minute until the glaze thickens and coats everything evenly.
Remove from heat and sprinkle with sesame seeds before serving hot.