Preheat the oven to 425°F (220°C), line a baking sheet, and pat the drained chickpeas thoroughly dry with paper towels.
Place the chickpeas and chopped zucchini on the tray, drizzle with olive oil, and sprinkle with paprika, cumin, salt, and pepper.
Toss everything together and spread it into a single layer so the vegetables and chickpeas have enough room to brown.
Roast for 22–25 minutes, stirring once halfway through, until the zucchini is caramelized and the chickpeas are lightly crisp.
Meanwhile, whisk tahini and lemon juice with enough water to create a smooth, pourable dressing.
Divide the cooked quinoa or rice among bowls and add cucumber, cherry tomatoes, roasted zucchini, and chickpeas.
Drizzle generously with tahini dressing and serve warm, adding herbs or extra lemon if desired.