Place hazelnuts in an oven safe dish and roast for 20 minutes. Transfer to a towel and rub away as many skins as you can. In a bowl, cover the hazelnuts with water. Transfer to a sieve and shake out the water. In another bowl, combine the confectioners' sugar, cayenne, cinnamon, and 1 teaspoon of salt. Add the hazelnuts and toss. Transfer to a sieve to shake off the excess coating. Arrange the hazelnuts on a parchment paper lined baking sheet and bake for 10 to 12 minutes, until the sugar is lightly caramelized and the hazelnuts are golden.
Cut the bacon into small pieces and cook until crisp in a skillet. Transfer to paper towel lined plate to drain and discard all but the last remaining tablespoon of bacon grease. Whisk the vinegar, olive oil, caper brine, and maple syrup into the bottom of the bacon skillet and set dressing aside.
In a large bowl, toss apples, kale, and chives with salad dressing. Mound the salad on plates and top with candied hazelnuts and bacon pieces.