Prepare the marinade by mixing together all the marinade ingredients.
Stab the chicken pieces all over with a fork.

Rub the marinade really well into the chicken pieces.
Place the chicken pieces on a plate and spoon on any remaining marinade.

Cover and chill for 6-8 hours.
Mix together the flour, cornflour and baking powder (the dry mix).
Take each chicken piece in turn and dip it first into the dry mix, then the beaten egg, then once more in the dry mix.

Deep fry the chicken pieces in a low to medium heat about 15 minutes.
Remove the chicken pieces from the oil and place on some kitchen paper to drain.
Serve with fries, salad and garlic dip.