Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Wrap the tofu block in a clean kitchen towel and place a heavy object on top for 15 minutes to press out excess moisture.
Cut the pressed tofu into 1-inch cubes and place them in a medium bowl.
Add the arrowroot powder, sea salt, and black pepper to the tofu, tossing gently until every cube is evenly coated.
Arrange the tofu cubes in a single layer on the prepared baking sheet and bake for 25-30 minutes, flipping halfway through, until the edges are golden and crispy.
While the tofu bakes, whisk together the peanut butter, tamari, rice vinegar, sriracha, and grated ginger in a small bowl until smooth.
Steam the broccoli florets and edamame in a steamer basket for 5-6 minutes until they are tender-crisp and bright green.
Remove the crispy tofu from the oven, toss it in the peanut sauce until well-coated, and serve immediately over the steamed vegetables.