Tom yum boran is a traditional noodle soup originating from Central Thailand. The soup is based on pork and egg noodles. Other common ingredients used to prepare tom yum boran include lime juice, onions, crushed peanuts, garlic, galangal, lemongrass, bean sprouts, red chili flakes, hot chili peppers, kaffir lime leaves, tamarind water, and fish sauce (nam pla).