I use some random combination of green chillies, garlic, gallangal(or ginger will do too) and lemon grass depending on how I am feeling when I am making it… and having just come back from Thailand, I now use about double what I did previously… they really do go in for using loads of paste over there!
You are then supposed to be able to split the thick part of the coconut cream in a frying pan, to seperate the oil and fry with that, but I can never manage that, so just use a small amount of oil to fry off the paste, then chuck in the coconut milk, followed by whatever else you fancy putting in there… those little baby aubergines work very well! Chuck in some kaffir lime leaves here if you have them…
Add palm sugar and fish sauce to taste…
Finish with thai basil and corriander, and a squeeze of lime…
Something like that anyway, I stopped using a proper recipe for this years ago.
If you really do want a recipe, see if you can find David Thompsons one online, if not, email me and I’ll see if I can copy it for you. His books are fantastic too btw.