01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - Place cauliflower florets and red onion on the baking sheet. Drizzle with 2 tbsp olive oil, sprinkle with smoked paprika, salt, and pepper. Toss to coat evenly.
03 - Roast vegetables for 25-30 minutes, stirring halfway, until golden and tender.
04 - In a medium saucepan, combine quinoa with 2 cups of water and a pinch of salt. Bring to a boil, reduce heat, cover, and simmer for 15 minutes, or until water is absorbed. Fluff with a fork and let cool slightly.
05 - In a small bowl, whisk together tahini, lemon juice, olive oil, water, minced garlic, ground cumin, salt, and pepper until smooth. Add more water as needed to reach a pourable consistency.
06 - Divide cooked quinoa among four bowls. Top with roasted cauliflower and onion, cherry tomatoes, and baby spinach.
07 - Drizzle generously with lemon tahini dressing. Sprinkle pistachios over the top. Serve immediately, or refrigerate for up to 2 days for meal prep.