Preheat the oven to 400°F and line a large baking sheet with parchment paper.
Dice the sweet potato into half-inch cubes and slice the chicken breast into thin strips.
Place sweet potatoes and chicken on the baking sheet, drizzle with olive oil, and season with sea salt and black pepper.
Roast for 20 to 25 minutes, or until the chicken is cooked through and the potatoes are fork-tender.
While roasting, remove the tough stems from the kale and tear the leaves into small, bite-sized pieces.
Place the kale in a large bowl, add the lemon juice, and massage with your hands for 2 minutes until the leaves are dark green and soft.
In a small jar, whisk together the apple cider vinegar and Dijon mustard to create the dressing.
Add the warm roasted chicken and sweet potatoes to the kale bowl, drizzle with the dressing, and toss well.
Sprinkle with hemp seeds before serving for an extra boost of plant-based goodness.