The unique flavor of this soup, rightfully famous all over the world, is achieved by the combination of fragrant lemongrass, kaffir lime leaves, shallots, lime juice, fish sauce, fresh chilies (or chili paste), and fat juicy prawns. Its fresh and rich exotic flavor instinctively sets your definition of the flavor of Thailand!
Tom kha kai is a related soup dish to tom yum goong. Similar spices, such as galangal, shallots, lemongrass, and kaffir lime leaves, set the basic flavor of the soup, except chilies are optional this time. Tender strips of chicken and aromatic Asian mushrooms form the mild body of the soup while creamy coconut milk is introduced and blends nicely with everything else.
Tom kha kai could be the best Thai food for people who are not so keen on chili dishes and could also offer them the same quality taste of Thai freshness.
This noodle soup is a lot less of a main course than the ones above, but it is always a popular choice from local street restaurants. It was originally served from boats along the canals of Bangkok (its name means boat noodles). The noodles are cooked with an amazing meat broth, which is a simmered broth containing typical Thai spices and meat. The ways to order it vary according to the meat you are having with it, such as chicken, pork, or seafood.
4. Pad Thai (Thai-Style Fried Noodles)
A signature dish in Thailand, pad Thai is supposed be on the menu of every restaurant in Thailand, from noisy street stalls to Michelin-starred restaurants in Bangkok. It comprises rice noodles (thin or wide) stir-fried with extravagant amounts of fresh prawns, crunchy bean sprouts, eggs, tasty tofu cubes, onion, and finely grated peanuts. A squirt of lime juice will complete the dish before it thrills every taste bud in your mouth.
Another frequently ordered dish of stir-fried noodles in Thailand, pad see ew comprises flat slippery rice noodles stir-fried with garlic, onion, egg, seasonal green vegetables, and meat (usually chicken or pork). A nice touch of adding oyster sauce and soy sauce provides the key elements to making the dish a tasty choice on every occasion.
Credit Source: https://www.asiahighlights.com/thailand/top-dishes