• Wash and soak the rice in 1 cup of water for minimum 2 hours
  
• transfer around 1/2 cup of water to a cup from the soaked rice and grind the rice along with cardamom, coconut, jaggery to a fine paste
  
• Now add the bananas, salt and pulse it a few times, transfer it to a bowl.keep it aside for minimum 1 to 2 hour maximum 3 to 4 hours
  
• After an hour, ... batter is ready to make the dosa. Consistency of the batter should be like this. I have used only half cup of water.
  

to make the Dosa:

• Grease and heat the tawa on medium low heat.
  
• Once the tava hot, take a ladleful of batter and pour it in the center and make the dosa
  
• put some ghee on the dosa and and to the edges as well, cover it and cook it
  
• Now the dosa ready, remove it and transfer it onto a plate. No need to grease the tava again.
  
• Repeat the same procedure with remaining dosa batter
• Serve hot with ghee or honey or maple syrup.