Ingredients
4 cups water
2 cups chicken broth
1 cup shrimp - peeled and deveined
1/2 cup mushrooms - sliced
2 limes
1/4 cup lemon grass - cut in long pieces
2 tablespoon fish sauce (in each bowl)
1/2 teaspoon crushed chili peppers
1-2 tablespoon nam prig pow (or tom yum paste)
1/2 cup cilantro - chopped

Instructions
Boil the water and broth in a 2 quart saucepan. Add the lemon grass and boil for 5 minutes. Add the fish sauce, the juice of one of the limes, the chili pepper, and the tom yum paste. Turn off the heat and add the mushrooms and shrimp. Stir until shrimp cooks and ladle into the bowls. Sprinkle with cilantro and serve with lime wedges.