Chop em up just like the other vegetables and meat. Fry it all in the wok for some time and then add a mix of green curry paste and coconut milk and let simmer for about 30 minutes. Don't forget to add lemongrass and chili
Only the Thais don't chop them up and fry them. Not in green curry, they get tossed in at the end and cooked for a few minutes only, they provide a nice bitter pop-crunch with green curry. You can also freeze them.