Heat a large frying pan or deep pot on medium heat. When hot, add the sugar, salt, cinnamon, and water and mix until fully combined. Allow to heat up, stirring occasionally.
When the sugar has completely melted, add the nuts and mix until fully incorporated. Watch over the pan and continue stirring often until most of the sugar has been coated and beginning to crystallize.
Remove pan from the heat and allow to sit for 1-2 minutes. Using a spatula or wooden spoon, stir the nuts once more to avoid overly large clusters and set on a plate or chopping board to cool completely.
Notes
For more cluster-sized portions, allow to sit for 10 minutes.TO STORE: Caramelized nuts can be stored in an airtight container at room temperature for up to two weeks or in the refrigerator for up to one month. TO FREEZE: Freeze them in a freezer-safe container for up to two months.TO OVEN-BAKE: Preheat the oven to 250F/120C degrees. In a large bowl, whip 2-3 egg whites with water, then add the nuts and toss to coat. Then, toss the nuts in the cinnamon sugar mixture. Transfer them to a baking sheet lined with parchment paper and bake for an hour (stirring every 20 minutes) or until crisp and caramelized.