Press the extra firm tofu for at least 15 minutes to remove excess moisture, then cut into 1-inch cubes.
In a small bowl, whisk together the tamari, gochujang, rice vinegar, minced garlic, and grated fresh ginger to create the stir-fry sauce.
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 skillet and sear for 8-10 minutes, turning occasionally, until all sides are golden brown and crispy.
Add the broccoli florets, sliced red bell pepper, and shelled edamame to the pan, sautéing for 4-5 minutes until the vegetables are tender-crisp.
Pour the prepared chili-garlic sauce over the tofu and vegetables, tossing constantly for 1-2 minutes until the sauce thickens and coats everything evenly.
Season the dish with sea salt and black pepper, then serve immediately while hot.