Preheat oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Toss sweet potato cubes with 1 tablespoon olive oil, 1/2 teaspoon salt, and 1/4 teaspoon pepper on the baking sheet.
In a separate bowl, coat chicken pieces with 1 tablespoon olive oil, smoked paprika, garlic powder, cumin, and remaining salt and pepper.
Arrange chicken on the sheet pan alongside the sweet potatoes in a single layer.
Roast for 20 to 25 minutes, or until chicken reaches an internal temperature of 165°F (74°C) and potatoes are fork-tender.
In a small bowl, whisk together tahini, lemon juice, maple syrup, and 1 to 2 tablespoons of warm water until smooth to create the dressing.
In a large mixing bowl, massage kale with the remaining 1 tablespoon of olive oil for 2 minutes until softened.
Divide cooked quinoa and kale among four bowls.
Top with roasted chicken and sweet potatoes, then drizzle evenly with the lemon-tahini dressing.