Mix all of the batter ingredients together and make a batter and set aside.
Marinate the chicken breasts with: aginomoto salt, white pepper and mustard paste. Set aside for half hour.
Dip the chicken breasts in the prepared batter and deep fry in oil until well done.
Take bun apart and spread mayonnaise on the bun. Put a leaf of lettuce and fried chicken breast in bun and close bun and serve