Steamed sea bass with a rice noodle salad

Name: Steamed sea bass with a rice noodle salad
Ingredients: 4 bok choi, cut into halves; 2 sea bass fillets, skin on; 2cm/1in knob fresh root ginger, thinly sliced; 2 sticks lemongrass, bruised and chopped in half; 2 tbsp sesame oil; 2 tbsp soy sauce; 250g/9oz rice noodles; 4 spring onions, trimmed and thinly sliced; 2 garlic cloves, roughly chopped; 5cm/2in piece fresh root ginger, roughly chopped; 1 long red chilli, roughly chopped; 3 tbsp palm sugar (or substitute soft brown sugar); 3 tbsp roughly chopped fresh mint; 3 tbsp roughly chopped fresh coriander; 2 tbsp rice wine vinegar; 2 tbsp lime juice; 1 tbsp vegetable oil