This technique is used for mok. Mok is a preparation of meat or fish usually wrapped in a banana leaf and then steamed. It allows the food to cook in its own juice.
If you don't have banana leaves, you can use baking paper.
Cutting the leaves
Remove the main rib from the banana leaf and cut it into pieces. You will need a strip of about 7 cm by 30 cm and another large cutout of 20 cm by 30 cm per mok.
Wash the cuts and heat them briefly, either with boiling water or steam, in order to soften them and prevent them from breaking when folding.
Place the stuffing in the center of the large cutout and fold it widthwise - parallel to the direction of the grooves.
Take one end, fold the bottom of the sheet towards the stuffing then fold the flap.
Turn the package over and repeat the operation on the other end: fold the bottom of the sheet towards the stuffing then fold the flap.
Wrap the small strip around the packet and secure with a toothpick.