Wash and soak raw rice for about 2 hrs.
Grind it roughly along with ½ cup coconut. Do not add water as there will be enough water content from jaggery and plantain.(You can add more coconut if you wish. More of coconut, more of flavour and taste.) Now add jaggery and give it a good blend. (If at all there are any impurities in jaggery, dissolve in water, filter and strain it before adding) Add sliced riped plantain and a pinch of cardamom powder. Grind it smoothy.
The batter will be thick enough with needed flowing consistency. Remember we have not added any water during grinding. The needed water content was available from jaggery and plantains. Add a pinch of baking soda and mix the batter evenly. In another pan, add oil/ghee, fry coconut pieces, nuts and raisins.
Grease a pan (that is to be steamed) with oil/ghee and spread the fried nuts and raisins evenly in its bottom. Now transfer the batter to the pan slowly.
Place a trivet stand or ring in a cooker and pour 3 cups water. Let it boil.
Now place the cake container inside the cooker.
Close the lid, and keep it for 15 min in high flame, without weight.
Check if its done by inserting a wooden stick, if it comes out clean, its cooked.
Transfer to a plate by flipping it upside down. Tasty plantain cake is ready.