Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Rinse and drain the chickpeas. In a bowl, toss them with ground cumin, smoked paprika, garlic powder, salt, and pepper.
Cube the firm tofu and cut the broccoli, red bell pepper, zucchini, and red onion into bite-sized pieces.
Place the vegetables on the baking sheet. For a lower calorie option, lightly spray with a cooking spray or drizzle very minimally with olive oil if desired, then season with salt and pepper.
Add the spiced chickpeas to the baking sheet. Roast everything in the preheated oven for about 20-25 minutes, until the chickpeas are crispy and the vegetables are tender with slightly charred edges.
While the ingredients roast, prepare the tahini dressing by whisking together tahini, lemon juice, a pinch of salt, and a tablespoon of water to reach a drizzling consistency.
Once roasted, assemble your Buddha bowl by layering the roasted chickpeas, tofu (you may sear the tofu in a non-stick pan for a few minutes on each side for extra crispiness before adding), and roasted vegetables.
Drizzle the creamy tahini dressing over the bowl, toss gently, and serve warm.