Press the extra firm tofu for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
In a small bowl, whisk together the tamari, rice vinegar, grated fresh ginger, and minced garlic 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 cubes to the skillet and sear for 8-10 minutes, turning occasionally until all sides are golden brown and crispy.
Toss in the broccoli florets, sliced red bell peppers, 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 2 minutes until the glaze thickens and coats everything evenly.
Season the stir-fry with sea salt, black pepper, and red pepper flakes to taste.
Garnish with sesame seeds and serve immediately while hot.