01 - Preheat the oven to 300°F. Line a baking sheet with parchment paper to prevent sticking.
02 - In a large mixing bowl, vigorously whisk the egg white and water until light and frothy.
03 - Pour the mixed nuts into the bowl and stir thoroughly, ensuring each nut is lightly coated.
04 - Combine the granulated sugar, brown sugar, ground cinnamon, and sea salt in a separate bowl, blending well.
05 - Sprinkle the sugar-and-spice blend evenly over the coated nuts, tossing until all are well encrusted.
06 - Distribute the coated nuts in a single layer across the parchment-lined baking sheet.
07 - Bake in the oven for 30 minutes, stirring gently one time halfway through to ensure even caramelization.
08 - Remove the tray from the oven and leave the nuts to cool completely on the sheet; the coating will crisp as it cools.
09 - Once fully cooled, transfer the roasted nuts to an airtight container for storage. Consume within 2 weeks for best quality.