Preheat the oven to 225°F and line two baking sheets with parchment paper.
Place the apple slices in a bowl and toss with 1 teaspoon cinnamon until evenly coated.
Arrange the slices in a single layer on one prepared baking sheet.
In a second bowl, stir together the mixed nuts, maple syrup, melted coconut oil, remaining teaspoon of cinnamon, and salt until the nuts are fully coated.
Spread the nut mixture onto the second baking sheet, pressing lightly to form small clusters.
Bake both sheets for 1 hour, then flip the apple slices and stir the nut clusters.
Continue baking for 45 to 60 minutes more until the apples feel dry and crisp and the nuts turn golden.
Remove from the oven and let everything cool completely on the sheets.