Remove the extra-firm tofu from its packaging and press between paper towels for 10 minutes to remove excess moisture, then cut into 1-inch cubes.
Slice the red bell pepper into thin strips and drain the baby corn if using canned.
Heat the toasted sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the tofu cubes to the pan and sear for 5-7 minutes, turning occasionally, until all sides are golden brown and slightly crisp.
Toss in the sliced bell peppers, baby corn, and shelled edamame, stir-frying for an additional 4 minutes until the vegetables are tender-prime but still retain a crunch.
Add the minced garlic, grated ginger, and red pepper flakes, sautéing for 1 minute until fragrant.
Drizzle the tamari over the mixture and season with sea salt and black pepper.
Toss everything together for one final minute to ensure the tofu and vegetables are well-coated in the glaze.
Remove from heat and serve immediately in a large bowl.