Tom Yam Kung Shrimp

Name: Tom Yam Kung (Shrimp)
Ingredients: ¼ cup lime juice; 1 tsp roasted chili paste; ¼ cup fish sauce (nam pla); 3 cups water or light chicken stock; 5 Hot green Thai chili peppers (optional); ½ cup sliced straw mushrooms; 2 garlic cloves, minced; 5 kaffir lime leaves (bai-ma-krut); 1 tbsp chopped cilantro/coriander leaves; 8 oz. shrimps, shelled and divided; 2 stalks lemon grass (lower 1/3 portion only, cut into 1 inch lengths); 3 slices fresh or dried galangal (Kha)