Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Press the tofu for at least 15 minutes to remove excess moisture, then cut into 1-inch uniform cubes.
In a mixing bowl, toss the tofu cubes with arrowroot powder, sea salt, and black pepper until each piece is evenly coated.
Spread the tofu in a single layer on the baking sheet and bake for 25 minutes, flipping halfway through, until the edges are golden and crispy.
While the tofu is baking, whisk together the peanut butter, tamari, sesame oil, rice vinegar, garlic powder, and ground ginger in a small bowl until smooth.
Steam the broccoli florets and edamame in a steamer basket over boiling water for 5 minutes until tender-crisp and bright green.
Transfer the crispy tofu to a bowl, toss with the peanut sauce until fully coated, and serve immediately over the steamed vegetables.