Cook the quinoa
Rinse quinoa under cold water.
In a medium saucepan, combine 1 cup quinoa with 2 cups water. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until water is absorbed. Remove from heat and fluff with a fork.
Roast the sweet potato
Preheat oven to 400°F (200°C).
Toss diced sweet potato with olive oil, paprika, salt, and pepper. Spread on a baking sheet.
Roast for 20–25 minutes, flipping halfway, until tender and slightly crispy.
Prepare the dressing
In a small bowl, whisk together tahini, lemon juice, maple syrup, garlic, and salt.
Add water a tablespoon at a time until it reaches your desired consistency (creamy but pourable).
Assemble the bowls
Divide quinoa between bowls.
Top with roasted sweet potato, chickpeas, cabbage, tomatoes, avocado slices, and greens.
Drizzle generously with lemon-tahini dressing.
Sprinkle with pumpkin seeds if using.