Whisk the fish sauce, pepper, garlic, chillies and sugar in a
bowl.
Put the chicken in a separate bowl and pour over half the
marinade.
Cover with cling film and refrigerate for 20 minutes (keep the
rest of the marinade on one side).
Heat the oil in a large frying pan over medium-high heat.
Add the chicken, in two batches, and cook for 3 minutes on each
side, or until it is cooked through. (Sometimes I put another
frying pan on top of the chicken and weigh it down with a couple of
tins to make the chicken really crisp).
for cucumber and cashew salad
While the chicken is cooking, add the lime juice and sugar to
the marinade that you set aside.
Stir until the sugar has dissolved to make a dressing.
Pour boiling water over the vermicelli and leave for a minute
or so until soft.
Drain under cold water, place in a large bowl and add the
cucumber, mint, spring onions and cashews.
Add the dressing and toss well.
To serve
Pile the salad onto the plate then slice the chicken and place
alongside.