• 1 c. shelled unsalted pistachio nuts
Preheat oven to 250 degrees. Combine the sugar, salt, onion and garlic powders, cumin, cayenne, cinnamon and white pepper in a small bowl. Combine all the nuts in a large shallow casserole. Beat the egg whites until they are frothy and pour over the nuts.
Toss the nuts in the egg whites until they are well coated and no egg white remains at the bottom of the casserole. Add the sugar-spice mixture and continue to toss and mix the nuts until they are thickly coated with spices.
Line a large (11-inch-by-17-inch) baking sheet with parchment paper. Transfer the nuts to the baking sheet and gently flatten them into a compact solid layer that covers the entire surface of the pan.