Combine teff flour and water in a large bowl, whisking thoroughly until a smooth, thin batter forms, with no lumps.
Cover the bowl loosely and let the batter rest at room temperature for at least 30 minutes to allow the teff flour to fully hydrate. (For a more traditional, sour Injera, ferment for 2-3 days).
Stir in the salt until it is completely dissolved. The batter should have the consistency of thin pancake or crepe batter, able to spread easily.
Heat a non-stick skillet or griddle (or a traditional mitad) over medium-high heat until it is hot but not smoking.
Pour about 1/2 to 3/4 cup of batter into the center of the hot pan, swirling quickly to spread it thinly and evenly across the bottom, forming a round.
Immediately cover the pan with a lid and cook for 2-3 minutes, or until the surface of the Injera is dry, tiny holes (eyes) have formed, and the edges begin to lift from the pan. Do not flip the Injera.
Carefully remove the cooked Injera from the pan and place it on a clean cloth or wire rack to cool slightly.
Repeat the process with the remaining batter, stacking the cooked Injera on top of each other as they cool to maintain their softness and flexibility.
Serve the fresh Injera immediately as a staple accompaniment, using it to scoop up Ethiopian stews, curries, and other dishes.