8 oz (250 g) shrimp/prawns, shelled and deveined, with shellsreserved
3 cups (24 fl oz/750 ml) water
2 garlic cloves (kratiem), minced
5 kaffir lime leaves (bai ma-good)
3 thin slices fresh or dried galangal (kha)
1/4 cup (2 fl oz/60 ml) fish sauce (nam pla)
2 stalks lemon grass/citronella (ta-krai), lower 1/3 portiononly, cut into 1-in (2.5-cm) lengths
2 shallots, sliced
1/2 cup sliced straw mushrooms
5 green Thai chili peppers (prik khee noo), optional
1/4 cup (2 fl oz/60 ml) lime juice
1 teaspoon black chili paste (nam prik pow)
1 tablespoon chopped cilantro/coriander leaves (bai pak chee)