450g (1lb) skinless chicken breast fillets
10ml (2 tsp) ground coriander
10ml (2 tsp) ground cumin
½ small onion, peeled and roughly chopped
1 clove garlic, peeled
2.5cm (1 inch) piece fresh root ginger, peeled and roughly chopped
30ml (2 tbsp) lemon juice
10ml (2 tsp) paprika
2.5ml (½ tsp) chilli powder, optional
5ml (1 tsp) salt
few sprigs fresh coriander
45ml (3 tbsp) natural yogurt