Combine parmesan, pepper and garlic powder. Unfold pastry sheets onto cutting board. Brush lightly with egg white; sprinkle each sheet with 1/4 of the cheese mixture. Lightly press into pastry, turn over; repeat. Cut each sheet into 2cm wide strips-you should get about 12 strips; twist.
Place on ungreased baking sheet and bake in oven for 15 minutes or until golden brown.