Tom yum

75 g. prawn, chicken, seafood, or oyster mushroom
30 g. straw mushroom or oyster mushroom
2 c. water
3 chilies
1/2 onion, sliced
1/2 tomato, sliced
3 kaffir lime leaves
1 lemongrass, sliced diagonally
2 sliced galangal
3 tbsp. lime juice
3 tbsp. fish sauce or soy sauce
1 tsp. sugar
1 tsp. roasted Tom Yum chili paste
1 coriander
1 sliced green onion

Heat water with kaffir lime, galangal, lemongrass.  Add chicken, boil until cooked.  Add mushroom, onion, tomato, and add everything else.

Source: Baan Thai cookery school, Chiang Mai, May 2010