Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Peel the sweet potato and cut it into 1/2-inch cubes, then slice the chicken breast into 1-inch bite-sized pieces.
In a small mixing bowl, whisk together the honey, olive oil, ground cinnamon, sea salt, and black pepper until the glaze is smooth.
Place the chicken and sweet potato cubes in a large bowl, pour the honey glaze over them, and toss thoroughly to ensure every piece is coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring space between pieces for even browning.
Roast for 20 to 25 minutes, flipping the ingredients halfway through, until the chicken is cooked through and the potatoes are fork-tender.
While the tray roasts, place the chopped kale in a bowl with the apple cider vinegar and massage with your hands for 1 minute until softened.
Divide the massaged kale between plates and top with the warm roasted chicken and glazed sweet potatoes.