Ingredients :

Par boiled rice - 200g.
Salt - 1/2 tsp.
Sesame or cumin seeds - 1 tsp.

Method :

1.  Soak the par boiled rice for 3 - 4 hours and grind it to a thin smooth paste.
2.  Keep it overnight to get sour. Add salt and cumin seeds. Add water to make the batter into a thin consistency.
3.  Then make into flat shapes and place it in thali vadam stand inside a large vessel or idli cooker. After it is cooked remove.
4.  Repeat this until all the flour is over. Then dry the cooked vadams in hot sun until they turn crisp.