In a mixing bowl, whisk together rice flour, tapioca flour, salt, and water until smooth.
Let the batter rest for 30 minutes.
Lightly oil a non-stick round pan or cake tin and pour a thin layer of batter into it.
Steam the batter for 4-5 minutes or until set and slightly translucent.
Remove from heat, let cool for a minute, then peel the noodle sheet off.
Repeat the process with the remaining batter.
Stack the sheets and slice into desired noodle width for stir-fry or soups.