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, grated ginger, minced garlic, and red pepper flakes.
Heat the sesame oil in a large non-stick skillet or wok 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 vegetable mixture, stirring constantly for 1-2 minutes until the sauce thickens and coats everything evenly.
Remove from heat and garnish with sesame seeds before serving hot.