01 - Preheat the oven to 350°F and line a baking sheet with parchment paper.
02 - In a large bowl, whisk olive oil with egg white if using, until frothy.
03 - Add mixed nuts to the bowl and toss thoroughly to coat with the oil mixture.
04 - In a separate bowl, combine ground cumin, smoked paprika, cinnamon, cayenne pepper, sea salt, and brown sugar.
05 - Sprinkle the spice mixture evenly over the coated nuts and stir to distribute all seasonings uniformly.
06 - Spread the nuts in a single even layer on the prepared baking sheet.
07 - Bake in the preheated oven for 18 to 20 minutes, stirring halfway through until nuts are golden and aromatic.
08 - Remove from the oven and allow the nuts to cool completely; they will crisp up as they cool.