Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Drain the extra-firm tofu and press it firmly between paper towels to remove excess moisture, then cut it into 1/2-inch cubes.
Dice the red bell pepper and slice the zucchini into half-moons.
In a mixing bowl, toss the tofu cubes, bell pepper, and zucchini with the extra virgin olive oil, sea salt, and black pepper until evenly coated.
Spread the tofu and vegetables in a single layer on the prepared baking sheet and roast for 20-25 minutes, tossing halfway through, until the tofu is golden and the vegetables are tender.
While the vegetables roast, place the cooked brown rice, shelled edamame, and nutritional yeast in a large serving bowl and stir to combine.
Add the warm roasted tofu and vegetables to the bowl along with the fresh parsley and fresh mint.
Drizzle the lemon juice over the salad and toss gently to incorporate all the flavors.
Sprinkle the hemp hearts over the top and serve immediately while warm, or refrigerate to enjoy as a chilled grain salad.