Press the tofu for 15 minutes using a heavy object to remove excess moisture, then cut into uniform 1-inch cubes.
In a small glass bowl, whisk together the tamari, freshly grated ginger, minced garlic, rice vinegar, and red pepper flakes.
Heat the toasted sesame oil in a large non-stick skillet or wok over medium-high heat until shimmering.
Add the tofu cubes to the pan and sear without overcrowding until golden brown and crispy on all sides, about 8-10 minutes.
Incorporate the broccoli florets, sliced red bell pepper, and edamame, stir-frying for 4-5 minutes until the vegetables are tender-crisp and vibrant.
Pour the prepared sauce over the tofu and vegetables, tossing constantly for 1-2 minutes until the glaze is glossy and coats every piece.
Season with sea salt and black pepper, then garnish with fresh green onions before serving immediately.