Creating the Roasted Veggie Power Bowl is simple when you follow these detailed steps:

1. Preheat Oven: Preheat your oven to 425°F (220°C).
2. Prepare Quinoa: In a pot, combine quinoa and water or vegetable broth. Bring to a boil, then reduce heat to low, cover, and simmer for about 15 minutes or until water is absorbed. Remove from heat and let it sit covered for 5 minutes.
3. Prepare Vegetables: While the quinoa cooks, chop zucchini, bell pepper, cherry tomatoes, broccoli, and red onion into bite-sized pieces.
4. Season Vegetables: In a large bowl, toss the chopped vegetables with olive oil, garlic powder, onion powder, salt, and pepper until evenly coated.
5. Roast Vegetables: Spread the seasoned vegetables on a baking sheet in a single layer. Roast in the preheated oven for about 20-25 minutes, or until they are tender and slightly caramelized, stirring halfway through.
6. Add Chickpeas: In the last 10 minutes of roasting, add the drained chickpeas to the baking sheet and continue roasting until heated through.
7. Fluff Quinoa: After the quinoa has rested, fluff it with a fork and season with a little salt and pepper if desired.
8. Assemble the Bowl: In a serving bowl, layer the quinoa, roasted vegetables, and chickpeas.
9. Top It Off: Add sliced avocado and garnish with fresh herbs. Drizzle with tahini, hummus, or your favorite dressing, if using.

These steps will guide you in creating a Roasted Veggie Power Bowl that is not only nutritious but also bursting with flavor!