My best friend, Deb, bought me a class at a Thai cooking school for my birthday. This was my favourite recipe. The most important thing I learned was, when it comes to Thai cooking, don't use substitutes - you only get the real flavour if you take the trouble to buy the right ingredients. This should be cooked in a wok, but a frypan will do if you don't have one. Don't be worried by the chillies, this dish is mild - as long as you remove the seeds from the chillies.