Sieve the rice flour and keep it ready. Heat a pan adding water and salt. Let it come to rolling boil.
Add oil to the water and as it starts boiling add rice flour.
Let the rice flour cook for few minutes without stirring. Then stir together, so that rice flour comes to dough form. Cook it for some more time. Once done, transfer it over a plate. When your hands can bear the heat of dough, knead it well. Ensure there are no lumps.
Divide the dough in to 5 balls of cylindrical shape. Arrange them over a idli stand or steamer and steam cook it for about 15 minutes.
If you insert a toothpick in to such dough ball, it should come out clean. If so, the dough balls are perfectly cooked. Fill the shavige press with the cooked rice flour dough.
Press it over a plate like a concentric circle. Repeat this process with rest of the dough.
Instant rice noodle or instant rice flour ottu shavige is ready to serve with chutney, curry or sweetened coconut milk.