Injera (Ethiopian Teff Bread) - cooking recipe

Ingredients

1/2 cup white teff flour
1/4 cup brown teff flour
3 tablespoons white teff flour, divided, or as needed
1 cup water
3 tablespoons water, divided, or as needed
1 teaspoon vegetable oil (optional)

Preparation

Mix 1/2 cup white teff flour and brown teff flour together in a bowl. Add 1 cup water and whisk well. Pour mixture into a glass container large enough to hold 3 times the original volume. Cover with cheesecloth or other breathable fabric to keep out dust; do not seal with plastic wrap as air circulation is vital. Leave covered container in a draft-free environment; the mixture needs air to be circulated in order to ferment. Stir batter 2 times over 24 hours.
Check for bubbles and possibly an increase in volume after 24 hours; there may also be a slightly tangy and sour smell. When you notice these things, add 1 tablespoon white teff flour and 1 tablespoon water to the batter and whisk well. Check in a few hours to see if bubbles have again formed, mixture has increased in volume, and the pungent smell is still evident; if so, the batter is ready and you can skip to the cooking process (step 5).
Leave batter to rest another 12 hours if the mixture has not begun to form or smell sour after the first 24 hours; stir once during this time. Check to see if bubbles have formed, mixture has increased in volume, and a pungent smell is evident; if so, proceed with step 4.
Mix together 2 tablespoons white teff flour and 2 tablespoons water in a bowl, making sure there are no lumps. Add mixture to the batter, whisking well. Wait a few hours; batter should be bubbly with a noticeable increase in volume and a pungent but fragrant smell, indicating it is ready to be cooked.
Heat an 8-inch crepe pan or nonstick skillet over medium heat. Add oil. Pour a scant 1/2 cup batter slowly and steadily into the hot pan in a circular motion from outside to inside. Cover the pan completely in a spiral without swirling. Cover, reduce heat to medium-low, and cook, allowing steam to cook the top of the bread, 1 to 3 minutes. Remove from pan with spatula and transfer to a plate; cover to keep warm. Repeat with remaining batter.