First of all roast the idli rawa till it changes colour and becomes easy to move around in the pan, dissolve the jaggery in the water.
Now mix together well all the ingredients except the soda and the accompaniment ingredients, use little less water than the given quantity, check the consistency, add more water only if required, it should be of pouring consistency but not runny, keep it covered for 30 minutes for the idli rawa to absorb moisture.
Grease oil to plate for that use a dhokla stand if you have.
Now dissolve the soda in a very little water and put in the batter, mix well and immediately pour ladlefuls of the batter in the plates.
Steam them in a steamer for 15-20 minutes till cooked and a knife comes out clean when poked in the centre of the cake.
Now remove from the steamer and allow it to cool.
from the sides.
Now remove from the plate and sprinkle some cardamom powder on top and make a sandwich with mango steam cake, place mango slice in between two pieces of cake,
Make sure you pass a knife around the edges of the plate so that the cake will be loose
decorate with cheery and serve with mango sauce.