how to make Chicken with tamarind sauce, shallots and pickled chillies ?

A traditional Vietnamese chicken recipe that has morphed from humble street food on the streets of Hanoi, where chicken wings are traditionally used, into a simple dinner made with chicken thighs.

INGREDIENTS
8 boneless, skinless chicken thighs, quartered (corn-fed or free-range chicken makes a big difference in flavour)
60ml fish sauce
2½ tablespoons sugar
2 garlic cloves, crushed
cornflour, for dusting
80ml vegetable oil
2 red Asian shallots, thinly sliced into half moons
1 thumb-size red chilli, sliced and soaked in 2 tablespoons rice wine vinegar
2 tablespoons torn mint leaves
2 tablespoons coriander (cilantro) leaves

For the tamarind sauce:

1½ tablespoons tamarind purée
1 teaspoon finely grated garlic
Juice of 2 limes
1½ tablespoons finely grated palm sugar (jaggery) or soft brown sugar
1 tablespoon fish sauce
2 teaspoons chilli flakes

METHOD
01.Combine the chicken, fish sauce, sugar and garlic in a large bowl and season with black pepper. Cover and refrigerate for at least 1 hour, or overnight if time permits.
02.Meanwhile, to make the tamarind sauce, put all the ingredients in a small saucepan and stir over low heat for 5 minutes or until the sugar has dissolved. Remove from the heat and set aside.
03.Drain the chicken and pat dry with paper towel. Dust the chicken in cornflour and shake off the excess. Put two large frying pans over medium–high heat and add 2 tablespoons of vegetable oil to each pan. When the oil is nearly smoking, add the chicken and cook, in batches, for 3 minutes on each side. When the chicken is browned all over, reduce the heat to medium–low and cook, turning frequently, for another 5 minutes or until cooked through. Drain on paper towel. 04.Transfer the hot crisp chicken to a large serving platter. Spoon the tamarind sauce over the top, then scatter with the sliced shallots, pickled chilli and herbs.