Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Press the firm tofu between paper towels to remove excess moisture, then cut into 1-inch cubes.
In a large mixing bowl, combine the tofu cubes, chickpeas, broccoli florets, and chopped bell peppers.
Drizzle the mixture with extra virgin olive oil and season with sea salt, black pepper, dried oregano, and garlic powder, tossing until everything is evenly coated.
Spread the vegetables and tofu in a single layer on the prepared baking sheet to ensure even roasting.
Roast for 25-30 minutes, tossing halfway through, until the tofu is golden and the vegetables are tender-crisp.
While the medley roasts, whisk together the Greek yogurt, lemon juice, and fresh parsley in a small bowl until smooth.
Serve the roasted vegetable and tofu medley warm with a generous dollop of the herbed yogurt sauce on top.