Place an oven rack in the center of the oven. Preheat the oven to 250 degrees F. Spray a baking sheet, liberally, with vegetable cooking spray. Set aside.
In a large bowl, whisk the egg whites until frothy. Add the nuts and stir until coated. In a small bowl, combine the sugar, curry powder, cumin, garlic salt, cayenne pepper, cardamom, and cinnamon. Sprinkle the sugar mixture over the nuts and toss until coated. Arrange the nuts in a single layer on the prepared baking sheet. Bake for 45 minutes until golden and fragrant. Cool for 1 hour.
Using a metal spatula, remove the nuts from the baking sheet. Break the nuts into bite- sized pieces and place in serving bowls.