To make the soup more substantial, add about 2 cups of steamed jasmine rice or cooked rice noodles before serving. Coconut milk, Asian curry paste and fish sauce are available at most supermarkets.
To serve as a main dish, put about 1/3 cup sauce in each of 6 small bowls and place each on a serving plate; surround each bowl with about 8 shrimp. For an appetizer, serve 4 shrimp per person with about 3 Tbsp. sauce on the side.