Asian sauces are as wide & varied, if not more so, than European cuisine. Fortunatly, from my point of view, being an Australian chef, we're alot more open to the influences of South-East Asia than most other western countries because of our geographical location. You will tend to find in Nth America & Europe alot of Australian chefs are being employed to teach the Europeans & American chefs how to cook Asian food.
First of all, I'll give you a brief history of modern European food.
It's commonly believed that modern food evolved from Asian food, after the return of Marco Polo from China. That may sound unusual, but if you think about it, Italy never had pasta until Marco Polo returned & at the end of the day, pasta is a type of noodle. From there, the Italians showed the French chef's these new tequniues. Which included sauces, before Marco Polo, there wern't many sauces in Eropean food besides the sauce that naturaly comes with stews.
But the characteristics of an asian sauce can depend on which part of Asia your talking about. In Japan & Nth China, tend to be sweeter, where as in Thailand, Vietnam & Indoneasia there's alot more chilli in their sauce.
In overall terms, Asian sauces try to excite all parts of the palate, the overall flavour of their food will hit the sweet palate, sour palate & salt palate all at the same time, creating a balance between these flavours is the key to Asian cuisine.
The sweetness can come from a variety of places, in the southern areas, palm sugar is the most comming ingredient, but also sweet fermented soy sauce is another sauce as well as coconut cream.
In the northern parts of Asia, you'll find the use of ponzu, mirin, sake & seaweed (Japan) & Hoi Sin, Plum sauce & Xhou Xhing [chineese cooking wine] (China & Korea).
The most common sorces of the salt comes from fish sauce & shrimp paste (Thai, Malay, Vietnamiese), Soy sauce & from the dried meats & seafood (Japan, China, Korea) & shabu shabu (Japan).
The sour flavour can come from Limes (Thai, Laos, Vietnam) & Vinegars in the north (Black vinegar in China & Korea, Rice vinegar in Japan).
As for India & the sub-continent, as you can imagine, food will go off very quickly in their envioronment, so their food is very heavily spiced to try & disguise the flavour of tainted meat. However, their cuisine is also very heavily influenced by the Brittish, butter (ghee, melted clarified butter, butter won't remain a solid in India for long), tomato & yoghurt are very common ingredience in Indian food, & India didn't have any of those until the Brittish settled.
In the south, you'll tend to find the curries are hotter a lot more chilli, where as in the north, they tend to be milder & more aromatic. Traditionaly, curries in India are made from goat's, chicken's & cammel's. Even today you will not find much beef in Indian restaurants because they are considered holy.
Indian food is about balancing the sweetness from onion (caramelised at the begining of the cooking process to release it's sweetness), chilli (yes, belive it or not, chilli's are sweet), & tomato with the spices, most commonly cumin, corriander, cinnamon & cloves.
As far as Middle eastern food, I'm not that sure about.
National dishes from certain regions include:
- Japan: sushi (which includes nagiri, sahimi & nori) & tapenyaki
- China: China has various styles of cuisine which include szechwan & peaking as their most famous. Szechwan is more spicy & more naturaly flavoured & most famously known for Szechwan pork. Peaking uses more sauces & other flavourings & is more complex on the palate, fasmous dishes include Peaking duck, bbq pork & sweet & sour.
-Thai, Malay, Cambodia: rice paper rolls, green papaya salads, banana blossom, nam jim, green curry, red curry & mussaman curry
-Indoneasia: Satay & nasi goreng
-India, Sri Lanka & Pakistan: Buttered chicken, vondaloo, tikka marsarla & tandori
hope this helped.