The first traces of Thai cuisine date back to the Ayutthaya Kingdom. The Ayutthaya, inspired by the recent arrival of the Portuguese, are documented to have made dishes such as foi thong - a dessert made from egg yolks and coconut milk, still popular today in Thailand. Thai Cuisine, as we know today, has been greatly influenced by Chinese cuisine. This influence began in the 18th century when many Teochew people settled in Thailand. Importantly, the Chinese introduced the Thai to the techniques of stir fry and deep-frying.
As written by Brian Mertens, a columnist for The New York Times, in an article titled Food Vendors: A Thai Tradition With a Twist of Innovation, "Thailand [has] 24,000 registered street vendors, who operate from wheeled carts, portable stalls and baskets slung on shoulder poles." Street vendors are common in most East Asian countries, however, as Mertens writes, "what's unique about the Thai approach is the extreme customization. A soup might have five types of noodles, with different meats, vegetables and garnishes, all cooked to order." For the most part, the most popular Thai dishes can be quickly prepared (quick stir fries with rice and quick curries) - thus food vendors have become a staple of Thai cuisine.