shrimp in half horizontally and rinse out the sand veins. 2. Place a large pot over high heat until hot. Add the oil, swirling to coat the surface. Add the shrimp shells; cook until they turn pink, abt 30 seconds. Add the brooth, lemon grass, lime peel, and chile. Bring to aboil over high heat. Reduce the heat to medioum-low, cover, and simmer for 20 minutes. Strain the broth, discarding the seasonings. Return the broth to the pot and heat tto simmering. Add the shrimp and straw mushrooms and cook until the shrimp turn pink, about 2 minutes. Stir in the lime juice and fish sauce. To serve, lade into individual soup bowls. Garnish with green onio, cilantro, mint leaves and chile.