Arrange the colocasia leaves by size, beginning with the largest to the smallest leaf.
Take the largest colocasia leaf and lay it out on a clean surface.
Top with a large spoonful of batter.
Use a clean spoon or your hands to spread the batter over the leaf.
Take the second largest leaf and place it opposite to the first leaf.
Repeat the process for the other leaves.
Once all the leaves are heaped on top of each other, cover it finally with more batter.
Fold one side of the leaves down and bring it to the center and repeat for the other side to ensure the leaves meet in the middle.
It should form a rectangle.
Cover with more batter.
Starting from the short side, start rolling it into a log that is tight enough without the batter squeezing out.
Once done, apply the remaining batter to coat the roll outside and stick down the loose ends.
To steam the alu vadi
Grease a dish with a few drops of oil and place it in the steamer/pressure cooker (don't use the whistle).
Place the rolls on the dish with the sealed side facing down.
Close the lid and steam on medium heat for 20 minutes.
Let it cool down. Cut the roll into wide pieces.