1 egg, separated
1/2 cup water
1 tablespoon vegetable oil
1 teaspoon salt
2/3 cup sifted flour
Vegetable oil (for frying)
3 Granny Smith apples
Confectioners' sugar

Beat egg yolk with water, oil and salt. Add flour and beat until smooth. Let stand at room temperature for about an hour.

Preheat oil in deep-fryer to 375 degrees F.

Peel and core apples, then cut into 1/4-inch rings. Beat egg white until stiff; fold into batter. Deep-fry, turning once, until golden brown. Drain on paper towel. Dust with confectioners' sugar before serving.