Prepare the thick coconut milk(I have used the maggi milk powder) using hot water.
Mix the rice flour slowly into it and make a thick batter. Add this into the blender to make it a smooth paste.
Add in the sugar, salt and cardamom powder.
Mix the yeast in lukewarm water (about 20 ml) and add to the batter.
Ferment for about 4-5 hours. Stir well and check the salt and sugar, adjust if required. Add the half of cashews & raisins mentioned.
Grease a plate or the idli moulds with butter or ghee. Pour the batter into it.
Steam in a steamer or idli cooker for 15 minutes on medium flame.
Open the lid. You can see the cake puffed up. Add the remaining cashews on top and steam for another 5 minutes.
Remove from flame and let it cool down. Cut into pieces.
Serve as breakfast or as snack.