Preheat your oven to 400°F.
Rinse and drain the canned chickpeas and pat them dry with a paper towel. Toss them lightly with a pinch of salt, pepper, and your favorite roasting spices if desired.
On a baking sheet, spread the chickpeas evenly and roast in the preheated oven for 20-25 minutes until slightly crispy, stirring halfway through.
While the chickpeas are roasting, prepare the vegetables. Toss the diced red bell pepper, zucchini, and sliced red onion with a light spray of olive oil (or use a non-stick spray) and a dash of salt. Spread them on a separate baking sheet and roast in the oven for about 15 minutes until tender.
Press the extra firm tofu to remove excess moisture, then cut into cubes. Optional: quickly sauté or lightly roast the tofu cubes for 8-10 minutes with a sprinkle of salt for extra texture and flavor.
Prepare the quinoa by following package instructions; measure out 1/3 cup cooked quinoa once ready.
For the creamy tahini dressing, whisk together the tahini and lemon juice. If desired, add a spoonful of water to thin the dressing to your preferred consistency.
Assemble the power bowl by layering the cooked quinoa, roasted chickpeas, tofu cubes, roasted vegetables, and raw spinach.
Drizzle the creamy tahini dressing over the bowl and serve immediately.