1. Whisk the egg white until it forms stiff peaks, set aside.
2. Mix together the flour, xanthan, onion granules and seasoning.
3. In a separate bowl, mix together milk, egg, oil and egg yolk.
4. Add the milk mixture to the flour mixture and beat well.
5. Gently fold the egg whites into the batter.
6. Meanwhile heat a half filled, heavy based saucepan of vegetable oil to about 180c.
7. Dip the corned beef in to the batter and carefully place the fritters in oil
8. Fry for about 5-6 mins or until crisp and golden.
9. Drain and serve warm.