Heat oil in a wok.Add the Cumin and mustard seeds.When they splutter add the Semolina and keep stirring till a nice aroma comes out.Remove the mixture in a bowl.

Add water to adjust the consistency of the idli batter.Finally add the fruit salt or baking soda and stem the idlis in a steamer for 15-20mins.

Serve these healthy and tasty idlis with sambhar.