When using frozen Sepia, let it thaw first. Then remove the moisture and pat dry.
In the meantime, start your bbq for a direct session at a high temperature. Place the skillet on the fire to preheat the pan.
Add some oil to the skillet and fry the Kaffir lime leaves to release it's fragrants.
Add a chunk of smoking wood between the coals (cherry) and wait until it starts smoking.
Grill the Sepia in the cast iron skillet at a high temperature for 2-3 minutes. Remove the excess liquid coming free in between.
Deglaze with lime juice to taste. Season to taste with salt if necessary.