Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Dice the sweet potato into 1/2-inch cubes and place them on the baking sheet, tossing with half of the olive oil, sea salt, and black pepper.
Season the chicken breast with garlic powder and the remaining sea salt and black pepper, then place it on the same baking sheet.
Roast for 20-25 minutes until the chicken reaches an internal temperature of 165°F and the sweet potatoes are fork-tender.
In a small jar, whisk together the remaining olive oil, maple syrup, apple cider vinegar, and dijon mustard to create the vinaigrette.
Place the chopped kale in a large bowl and massage with a teaspoon of the dressing for 1 minute until the leaves are dark green and tender.
Slice the roasted chicken into strips and assemble the bowl by layering the kale, sweet potatoes, chicken, and pecans, then drizzle with the remaining maple vinaigrette.