1.Heat the gas, put 500ml water in a pot, let it boil then add tom yum paste;stir it until it dissolved with the water
2.Add galangal, lemongrass, chilli and kaffir leaves, wait for 1-2 minutes until it relases the fragrant of the herbs.
3.Add the prawns and stir until they turn pink
4.Add mushrooms, seasoning sauce, sugar, lemon juice, fish sauce and wait for 2 minutes
5.Add cherry tomatoes before serving
1.Clean the prawns first, get rid of their shells and black lines on the back and at the front, using a small sharp knife to devine the paths.
2.Mushroom should be cut in halves if they're big