1. Trim the brains so that any membrane is removed. 2. In a blender, combine the brains with the kaffir leaves, coriander, spring onion and chili paste. 3. Scoop out the mixture on two banana leaves per portion to make a total of eight parcels, and secure with a toothpick or string. 4. Insert the Teflon grill tray in the oven and set on dry heat at 160°C. 5. Grill the parcels for about 30 minutes, flipping often.