Press the tofu for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
In a small bowl, whisk together the tamari, rice vinegar, minced ginger, minced garlic, and red pepper flakes to create the stir-fry sauce.
Heat the toasted sesame oil in a large non-stick skillet over medium-high heat.
Add the 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 edamame, sautéing for 5 minutes until the vegetables are tender-crisp.
Pour the sauce over the tofu and vegetables, stirring constantly for 1-2 minutes until the glaze thickens and coats everything evenly.
Garnish with sliced green onions and serve immediately.