Preheat the oven to 425°F. Toss the cauliflower florets and chickpeas with olive oil, cumin, smoked paprika, salt, and black pepper on a large baking sheet.
Spread the mixture in a single layer and roast for 25 to 30 minutes, stirring once halfway through, until the cauliflower is tender and the chickpeas are crisp.
While the vegetables roast, whisk together the tahini, lemon juice, and water in a small bowl until smooth and pourable.
Divide the cooked quinoa and baby spinach among four bowls.
Top each bowl with the roasted cauliflower and chickpeas.
Drizzle with the tahini sauce and finish with chopped parsley and pomegranate seeds.