Central Plains
Although the presence of Bangkok in the heart of the Central region has acted like a magnet to draw in regional influences, there are still many local specialties that mark out the food styles here as distinctively Central. The best rice is grown in this region, notably the khao hom mali, or jasmine rice, that is so highly rated as a Thai export. There are three curries typical of the region, namely the familiar green curry (kaeng khieo wan) to which is usually added poultry or fish; a hot curry known as kaeng phet , and a milder version called kaeng phanaeng . All are based on coconut milk.
Tom Yam , the famous hot and sour soup, originates from the Central region. There is also a creamy coconut milk soap made with chicken called tom kha kai . Yam, the tangy salads, are a Central invention. Haw mok, little banana leaf cups of a souffl?-like mix made from red curry paste, egg and coconut milk, with seafood added, are a popular snack item. Phat pet is a stirfry with basil and curry paste. Most meals in the Central region will include an omelets of some kind, either a plain one served with a thick sweet chilli sauce, or with oysters added. There is a more substantial omelets filled with ground pork, tomato and onion, called khai yat sai.
The Chinese influence is especially strong in the Central region. You will find it in the plain soups that usually include tofu, ground pork and green squash, in the clay pot dishes, and of course in the noodle dishes such as kuay tiaw .
Travel a little with in the Central region and you will find some real local specialties. At Nakhon Pathom, to the west of Bangkok, you will find sticky rice and coconut steamed in a length of bamboo. This is known as Khao lam. You will also find it at Nong Mon market in Chon Buri province, near Pattaya, a road side market about a kilometer in length that is also famed for its dried fish. Chanthaburi, close to the Cambodian border, has its own noodles fried with crab meat. A distinctively flavoured leaf, chamuang , grown in the forests here , and is used in curries. There is a chilli paste dip from the coastal areas of the eastern Central region, made from crab egg and yellow chilli.
Travel southwest of Bangkok to the town of Phetchaburi and you will find khanom maw kaeng, a baked custard. There are many varieties but they are all based on mung bean, egg and coconut milk. Slightly further south , along the coast , Cha-Am and Hua Hin are renowned for their seafood. Cha-Am has a picturesque harbour where oysters are bought in fresh by the boat load. Kanchanaburi, further west towards Myanmar, has a tremendous variety of curries created by the Mon ethic grouping.

The North
Because of the cooler mountain climate there is a large variety of vegetables in northern Thailand than in other regional Thai cuisines, and roots and herbs have a strong presence. There are many sour and bitter flavours, especially apparent in the Soups.
People of the North prefer glutinous rice to white rice, rolling it into balls with their hands, and dipping into dishes and sauces. Som tam, the spicy green papaya salad highly popular in the Northeast, is also a familiar dish in the north.
Popular dishes include khao soi, a curry broth with egg noodles and chicken, pork or beef; and kaeng hang lay , a pork curry seasoned with ginger, tamarind and turmeric. Curries are thinner in this region with the two most popular curry dishes are kaeng yuak, made with banana palm hearts; and kaeng khanoon, made from the aromatic jackfruit. Sausages are a specialty. The best known is sai ua, which blends ground pork with dried chillies, garlic, shallots and lemongrass to produce a spicy red sausage.
The North is noodle heaven, the ethnic mix of Yuananese, Shan and Burmese having produced a seemingly endless range of kuay tiaw and khanoom cheen dishes. In Chiang Mai, the khao soy egg noodles eaten with chicken or beef curry and a number of spicy and sour side dishes was brought in by the caravans of Yunnan Moslems. Khanom chin nam ngiew is soft thin rice noodles with pork rib, tomatoes and black bean sauce.
No visit to the North is complete without sampling a khan toke dinner. The name derives from a khan , or a bowl , and a toke , a low round table made of woven bamboo, plain or lacquered. Guests sit on the floor, usually watching a cultural performance, and serve themselves from the assorted dishes of northern specialties placed on the table.

The South
The South is home to most of Thailands Muslims, its largest religious minority. They are mostly concentrated in the provinces adjacent to Malaysia, where Malay is spoken as commonly as Thai. In other southern provinces such as Songkhla and Phuket, Chinese predominate.
Southern food reflects all this diversity. The coconut is used to the full, its milk thickening soups and curries, its oil for frying its grated flesh as a condiment. Cashew nuts and pineapple also grown in volume, and from a familiar part of the cuisine.
The warm seas produce an abundance of fish, big lobsters, crabs, mussels, squid, prawns and scallops, prepared simply by steaming or frying, or more elaborately by cooking in a clay pot with noodles. Southerners like their food chilli-hot, and are also fond of the bitter taste imparted by a flat, native bean called sataw.
A dish very typical of the South is kaeng tai pla, a very hot curry made with fish stomach, green beans, pickled bamboo shoots and potato. Fresh turmeric turns this and many other southern curries a distinctive yellow.
There is even a dish that is called simply yellow curry (kaeng leuang), made from fish,green squash, pine apple, green beans and green papaya.
The Chinese dish of thin rice noodles knowns as khanom chin appears here in a spicy fish curry sauce, serve with cucumber, pineapple , pickled cabbage and other fruits and vegetables. Roti. A round flat wheat bread descended from the Indian breads, is a real southern flavourite, totally assimilated into the local culture.
Coffee, grown in the south, is a popular beverage and coffee shops can be found throughout the region. In some parts the coffee will be roasted on the premises with a charcoal-fire boiler, and serve with a range of snacks that can include steamed buns dumplings and a form of doughnut called pa thong ko.

The Northeast

The Northeast was long regarded as remote from Bangkok and its direct influence. The Lao kingdoms on the other side of the Mekong River held greater sway over the region until the French drew up their Indochine boundaries in the late 19th century, forcing the vast plateau that the Thais call Isan more firmly into the embrace of Bangkok.
For food, glutinous rice is preferred to the white variety. Roasting and grilling give a strong savoury flavoury to much of the food , as dose the inclusion of herb and pickled ingredients. Chillies also tend to be used with greater gusto here , to liven up a meal that might otherwise somewhat impoverished in terms of cop.
Som tam is an art here. The green papaya is pounded in a mortar with lime juice, garlic , fish sauce and a number of other ingredients. A popular style has a shrimp , cherry tomato and roasted peanuts. Another has pickled field crab and very pungent fish sauce named pla ra.
Kai yang or grilled chicken, is another Isan special , the art lying in the prepation of galic, coriander root, black pepper and fish sauce that is rubbed over the chicken before it is cooked slowly over hot charcoal. A variety of dips are served the chicken. Larb is a kind of salad made by tossing minced meat, poultry or fresh water fish with fresh mint leaves, spring onion , lime juice, grounded dried chili , uncooked rice that has been dry roasted to a brown colour . Neua nam tok is art of salad , using larb-like ingredients, with beef that has been charcoal-grilled so the fat run out: the Thai name translates as waterfall beef.
An Isan meal will include a spicy soup made from lemongrass, galangal, onions ,kaffir lime leaves and chili. There are many variations, with beef tripe and liver, or chicken and tamarind leaves heading up the list of favourites.
Peculiar to the region is the giant Mekong catfish name pla beuk can be caught only at a certain time of the year, usually in May , it is stored frozen for the restaurants that specialize in this dish.