Hi Chris
If you want the type of chillies as the restaurant use which is the type sold in Indian grocers just buy a few and dry them on a rad or remove the seeds and put them in an airing cupboard for a week or two and then plant out, I must say I have had great success from packets of dried chillies, where I am SW France the summers are hot so they grow really well here just as wel as chillies are hard to get fresh and so expensive you would not believe!!!!!
I also grow lemon grass, corriander and ginger, but chillies are my favourite, purchased lots of different dried chilies last year so will have a large variety this year (fingers crossed)
regards