Drain the extra firm tofu and press it between paper towels for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
In a small bowl, whisk together the tamari, rice vinegar, minced 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 in a single layer and sear for 8-10 minutes, turning occasionally until all sides 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.
Season with sea salt and black pepper, then transfer to a plate and sprinkle with hemp hearts before serving.