Whereas most foreigners mistakenly believe the tasty stir fry Pad Thai to be Thailand's national dish, it is actually Tom Yam Kung. While not as well known outside of Thailand, the hot and sour shrimp soup Tom Yam Kung predates it and is locally accepted as the national dish of Thai citizens. It's a must-try with countless variations on the classic recipe that relies on oyster mushrooms, galangal, lime, chilies, and lemongrass.