Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Peel the sweet potato and dice it into half-inch cubes, then cut the chicken breast into similar bite-sized pieces.
In a large mixing bowl, whisk together the honey, olive oil, garlic powder, smoked paprika, sea salt, and black pepper until smooth.
Add the diced chicken and sweet potatoes to the bowl, tossing thoroughly to ensure every piece is coated in the glaze.
Spread the mixture onto the prepared baking sheet in a single even layer, ensuring the pieces are not overcrowded.
Roast for 22 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the potatoes are golden and tender.
Remove from the oven, drizzle with apple cider vinegar for a hit of acidity, and serve immediately over a fresh bed of baby spinach.