Firstly, in a large bowl take 1 cup moong dal, 2 tbsp chana dal, and 2 tbsp rice.
Soak in water for 6 hours or until the dal softens.
Drain off the water and transfer to the mixer jar.
Add 4 chilli, 2 inch ginger, 1 tsp cumin, and grind to smooth batter adding water as required.
Transfer the batter to the large bowl.
Add ½ tsp salt, and half a cup of water and mix well adjusting the consistency.
Heat the dosa pan and pour the dosa batter.
Spread gently as thin as possible.
Now top with onion, cumin, and oil.
Roast on low to medium flame until the dosa turns golden brown and crispy.
Finally, enjoy the Pesarattu Recipe with chutney or upma.