1. Whisk together egg and ice water in a small bowl. Add flour all at once, and whisk until combined but still slightly lumpy. Stir in nori and salt.

2. Heat oil in a deep, heavy pot or a deep-fryer until it registers 360 degrees on an instant-read thermometer. Dribble spoonfuls of batter into hot oil; fry, covered with a splatter screen, until pale golden and crisp, 1 to 3 minutes. Using a slotted spoon, transfer to paper towel to drain.