750 ml (l 1/4 pints) 3 cups coconut milk
475 ml (16 fl oz) 2 cups chicken stock
4 stalks lemon grass, bruised and chopped
2.5 cm (1 in) piece galangal, thinly sliced
10 black peppercorns, crushed
10 kaffir lime leaves, torn
300 g (11 oz) boneless chicken, cut into thin strips
115 g (4 oz) button mushrooms
50 g (2 oz) baby sweetcorn
60 ml (4 tbsp) lime juice
45 ml (3 tbsp) fish sauce
2 red chillies, chopped, to garnish
chopped spring onions, to garnish
coriander leaves, to garnish