Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Press the extra firm tofu between paper towels to remove excess moisture, then cut it into uniform 1-inch cubes.
In a large mixing bowl, toss the tofu cubes, broccoli florets, and sliced red bell pepper with olive oil, sea salt, black pepper, and garlic powder.
Spread the tofu and vegetables in a single layer on the prepared baking sheet and roast for 20-25 minutes until the tofu is golden and edges are crisp.
While the vegetables roast, steam the shelled edamame until tender and bright green.
Prepare the dressing by whisking together the tahini, lemon juice, and nutritional yeast in a small bowl, adding a tablespoon of warm water if needed to reach a smooth consistency.
Assemble the Buddha bowl by placing the roasted vegetables and tofu over the steamed edamame, then finish with a generous drizzle of the lemon-tahini dressing.