01 - Preheat oven to 425°F (220°C).
02 - Toss cauliflower florets with olive oil, cumin, smoked paprika, salt, and pepper. Spread on a baking sheet in a single layer.
03 - Roast for 25-30 minutes, turning halfway, until golden and tender.
04 - Meanwhile, combine quinoa, water, and salt in a medium saucepan. Bring to a boil, then cover and reduce heat to low. Simmer for 15 minutes, then remove from heat and let stand, covered, for 5 minutes. Fluff with a fork.
05 - For the dressing, whisk together tahini, lemon juice, garlic, olive oil, water (adding gradually), salt, and cumin until smooth and creamy. Adjust water for desired thickness.
06 - To assemble, divide quinoa among 4 bowls. Top with roasted cauliflower, cherry tomatoes, red onion, parsley, mint, and pumpkin seeds.
07 - Drizzle generously with lemon tahini dressing. Serve with lemon wedges.