Preheat oven to 400°F (200°C).
On a large baking sheet, toss sweet potatoes, Brussels sprouts, and chickpeas with olive oil, smoked paprika, salt, and pepper.
Roast vegetables for 25 to 30 minutes, tossing halfway through, until tender and caramelized.
In a medium saucepan, combine quinoa and vegetable broth. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes until liquid is absorbed.
Season chicken breasts with salt and pepper. Sear in a skillet over medium-high heat for 6-7 minutes per side until the internal temperature reaches 165°F (74°C).
Allow chicken to rest for 5 minutes before slicing into strips.
In a small bowl, whisk together tahini, maple syrup, lemon juice, and 2-3 tablespoons of warm water until a smooth, pourable consistency is reached.
Place kale in a large bowl and massage with one tablespoon of the dressing to soften the fibers.
Divide cooked quinoa into four bowls. Top with roasted vegetables, sliced chicken, and massaged kale.
Drizzle remaining tahini dressing over the bowls and garnish with pumpkin seeds.