Follow the steps of cutting and cleaning the leaves (Refer Notes Below and the main blog post for pictorial steps)
Prepare the steamer by boiling some water and greasing the steamer plate with few drops of oil. It will prevent the leaves from sticking to the plate after steaming.
Now take a clean dry glass bowl and sift the besan or chickpea flour.
Add all the ingredients – turmeric powder, Kashmiri red chilli powder, ginger and green chilli paste, tamarind paste, jaggery, hing and salt to taste.
Mix this well using a whisk. Now add water slowly to make a thick batter.
Now place a leaf on the kitchen counter or a wooden board and apply the batter using your hands.
Now place another leaf on top (upside down) and repeat the process of applying the batter.
Repeat the process for all the 6 pieces. Now fold the edges (it will stick due to the batter) and then slowly roll them into a tight log.
Follow this method for the remaining set of alu leaves and place all the 3 logs for steaming on to the greased plate.
Steam the leaves for atleast 15 to 20 minutes on medium heat. Once they have steamed, you will notice the chickpea batter has thickened and sort of stuck to the leaves. The leaf will also be dark in colour.
Allow the logs to cool completely before slicing.
Once the vadis are cooled, cut them into equal slices.
Now heat a pan, add oil, sesame seeds, mustard seeds and hing (asafoetida).
Add the cooked and sliced pieces of alu vadi and toss them gently. Allow them to cook for a couple of minutes on the pan before serving them immediately. Sprinkle some grated coconut.