Prepare the lemongrass by cutting the ends, pulverize it with a pestle to release more flavour and then cut it into small pieces
Slice the galangal
Cut the shallots
Pull apart the kaffir lime leaves
Cut up the coriander
Slice the spring onions
Pulverize the chillies
Slice the tomatoes
Cut up the oyster mushrooms
Squeeze the limes into a bowl
Add 2 cups of water to your wok and turn up the heat
Add the lemongrass, shallot & galangal
Add half a tsp of salt and bring it to the boil
Let it boil for a minute or so then add the chilli paste
Let it boil for another minute then add your prawns
Let it boil for a couple of minutes before adding 80ml of evaporated milk
Bring it to the boil again then turn off the heat
Add the lime juice and fish sauce and stir them in
Add the coriander, tomatoes and spring onions and mix them in
Your Tom Yum Soup is now ready to serve