Press the extra firm tofu for 15 minutes to remove excess moisture, then cut into 1-inch cubes.
In a small mixing bowl, whisk together the tamari, lime juice, grated fresh ginger, and red chili flakes to create the dressing.
Heat the sesame oil in a large non-stick skillet over medium-high heat.
Add the tofu cubes to the skillet and sear for 8-10 minutes, turning occasionally until all sides are golden and crisp.
Season the tofu with sea salt and black pepper during the final minute of cooking.
In a large salad bowl, combine the baby spinach, diced mango, edamame, sliced red bell pepper, and sliced cucumber.
Add the warm seared tofu to the bowl and drizzle the prepared Thai chili dressing over the top.
Toss everything gently to ensure the leaves are coated and serve immediately.