Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Press the extra-firm tofu for at least 15 minutes to remove excess moisture, then cut it into 1-inch cubes.
Prepare the vegetables by cutting the broccoli into bite-sized florets and slicing the red bell pepper into thin strips.
In a large mixing bowl, whisk together the low-sodium tamari, lemon juice, garlic powder, onion powder, sea salt, and black pepper.
Add the tofu cubes to the bowl and toss gently until every piece is coated in the marinade.
Sprinkle the nutritional yeast over the tofu and toss again to create a savory, protein-rich crust.
Spread the tofu and vegetables in a single layer on the prepared baking sheet, drizzling the olive oil specifically over the broccoli and peppers.
Roast for 25-30 minutes, tossing the ingredients halfway through, until the tofu is firm and the vegetables are tender and slightly caramelized.
Remove from the oven and divide into meal prep containers for a clean, plant-powered dinner.