Preheat oven to 400°F (200°C).
In a large bowl, toss cubed chicken, sweet potatoes, and Brussels sprouts with 2 tablespoons olive oil, garlic powder, smoked paprika, salt, and pepper.
Spread ingredients in a single layer on a large parchment-lined sheet pan and roast for 25 to 30 minutes until chicken reaches an internal temperature of 165°F.
Combine quinoa and chicken broth in a saucepan, bring to a boil, then cover and simmer on low for 15 minutes until liquid is absorbed.
Whisk together the remaining 1 tablespoon olive oil, apple cider vinegar, and Dijon mustard to create the vinaigrette.
Distribute massaged kale and cooked quinoa evenly into four airtight meal prep containers.
Layer the roasted chicken, sweet potatoes, and Brussels sprouts over the base.
Top with dried cranberries and pecans; store vinaigrette in separate small containers or drizzle immediately if serving.