On a skillet, lightly toast the sesame seeds. Allow to cool.
In a mixer jar, grind the sesame seeds, crushed jaggery and seeds from cardamom pods into a coarse powder
In a large bowl, add the peeled bananas and mash coarsely with a fork. Add the flours, the jaggery-sesame-cardamom mix and mix well with the fork.
Add the milk and whisk with a fork until you get a thick batter. You will find small bits of banana in the batter, which you can leave as it is.
Add 1 tbsp melted ghee and stir to mix well.
Keep covered and let it sit for 15-20 minutes.
Heat a non stick pan, grease with ghee.
Pour 1 tablespoon of batter per dosa/pancake, do not spread /thin out. You can make 4-5 dosas / pancakes at a time depending on the size of the skillet/tava.
Allow to cook on one side for 45 seconds-1 minute and then flip over. Drizzle ghee along the sides and allow this side to cook and turn golden brown as well.