In a mixing bowl, whisk together the fermented coconut flour and salt until evenly combined.
Gradually pour in water while stirring, mixing until you achieve a smooth, pourable batter with a slightly thick consistency.
Let the batter rest for a few minutes; it will thicken slightly, allowing the coconut flour to hydrate fully.
Heat a non-stick skillet or griddle over medium heat and brush lightly with oil until shimmering.
Pour a ladleful of batter onto the hot skillet, spreading it out gently with the back of the ladle to form a thin, even circle.
Cook the dosa for about 2-3 minutes, or until the edges start to turn crispy and golden brown, with bubbles appearing on the surface.
Carefully flip the dosa using a spatula and cook for another 1-2 minutes on the other side until evenly crisped.
Remove the dosa from the skillet and place it on a plate; repeat with the remaining batter, adding more oil as needed.
Serve the coconut flour dosas hot, with your favorite condiments or sides.