Put whites in a large bowl and let stand at room temperature 15 minutes.
2
With an electric mixer, beat whites until they hold stiff peaks and with a metal spoon thoroughly fold in Parmesan and cayenne. Roll mixture into about twenty 3/4-inch balls.
3
In a 3-quart heavy kettle heat 1 inch oil to 375 degrees. Working in batches, fry balls, turning them until golden - about 2 minutes. Transfer to paper towels to drain.
4
This recipe yields 20 puffs; 0.5 carb grams per serving.