01 - Preheat oven to 425°F. Line two baking sheets with parchment paper.
02 - Pat chickpeas thoroughly dry with a clean kitchen towel. Toss with olive oil, smoked paprika, cumin, garlic powder, salt, and pepper. Spread evenly on half of one baking sheet.
03 - Arrange sweet potato, bell pepper, zucchini, and red onion on the second baking sheet. Drizzle with olive oil, then sprinkle with oregano, salt, and pepper. Toss vegetables to coat evenly.
04 - Roast chickpeas and vegetables for 25-30 minutes, stirring once halfway through cooking, until chickpeas are crispy and vegetables are tender with light browning.
05 - Combine rinsed quinoa, water or broth, and salt in a saucepan. Bring to a boil over high heat, reduce heat to low, cover, and simmer for 15 minutes. Remove from heat and let stand, covered, for 5 minutes. Fluff with a fork.
06 - Whisk together tahini, lemon juice, water, maple syrup, garlic, salt, and pepper until smooth and creamy. Add additional water, 1 teaspoon at a time, if needed to achieve pourable consistency.
07 - Divide cooked quinoa among four serving bowls. Arrange roasted vegetables, chickpeas, spinach or greens, and pumpkin seeds on top. Drizzle generously with tahini dressing and garnish with fresh herbs if desired.