01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - Toss diced sweet potato, bell pepper, and sliced red onion with olive oil, salt, and pepper. Roast on the prepared baking sheet for 20 to 25 minutes, stirring halfway through, until tender and lightly browned.
03 - Bring quinoa and water to a boil in a saucepan. Reduce heat to low, cover, and simmer for 15 minutes or until the water is absorbed. Remove from heat and fluff with a fork.
04 - Whisk together tahini, lemon juice, olive oil, minced garlic, salt, and pepper in a small bowl. Add water one tablespoon at a time until the dressing reaches a creamy, pourable consistency.
05 - In a skillet over medium heat, sauté the drained chickpeas with a pinch of salt for 3 to 4 minutes until slightly crisp.
06 - Distribute spinach evenly among four bowls. Top with quinoa, roasted vegetables, cherry tomatoes, sautéed chickpeas, optional feta cheese, and roasted pumpkin seeds.
07 - Drizzle lemon-tahini dressing over each bowl and serve immediately.