Step 1. Transfer the tofu to a large rimmed baking sheet. Mix the tamari, nutritional yeast, garlic powder, onion powder, and turmeric in a medium bowl. Toss tofu in marinade until evenly coated. Add a drizzle of olive oil.
Step 5. Transfer the bell peppers and onion to a large baking sheet. Add a drizzle of olive oil, garlic powder, onion powder, smoked paprika, and oregano. Toss to coat. Roast with the tofu and potatoes until golden brown.