before the pig or turkey is placed in the imu,chopped pieces of banana plant are spread over the hot rocks. the white, juicy lining of this plant makes a lot of steam, but it can also cause a bitter taste, so ti leaves are layered over it. finally, the pig or turkey is placed in the imu, along with sweet potatoes, pineapple,plantain,cegetables, and even fresh fish - all wrapped in ti leaves.