Remove the chicken from the packaging and place it on a rimmed baking sheet. Bake the chicken for 20 to 25 minutes, or until the skin reaches your desired crispiness.
While the chicken roasts, make the salad:
In a large bowl, whisk together the lemon juice, mustard, and maple syrup. Stream in the olive oil while whisking until it is fully incorporated. Season with salt and pepper to taste.
Add the kale and apple and toss to coat. Sprinkle the salad with hazelnuts and parmesan.