Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Drain the extra firm tofu and press it between paper towels to remove as much moisture as possible, then cut it into 1-inch cubes.
Chop the red bell pepper into bite-sized pieces and prepare the broccoli florets.
In a large mixing bowl, whisk together the olive oil, lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Add the tofu cubes, broccoli, and bell peppers to the bowl and toss thoroughly until everything is evenly coated in the herb dressing.
Spread the tofu and vegetables in a single layer on the prepared baking sheet and roast for 20 to 25 minutes, tossing halfway through, until the tofu is golden and the veggies are tender.
Place the warm cooked quinoa in a serving bowl and top with the roasted tofu and vegetable mixture.
Finish the dish by adding a dollop of nonfat Greek yogurt and hummus on top for a creamy, high-protein finish.