Toast the teff (optional): Place the teff in a frying pan and warm it over low heat, stirring often. You'll know it's ready when you hear tiny popping and crackling sounds, which usually takes about 2 minutes.
Add water: Transfer the toasted teff to a 2-quart saucepan. Pour in the water, add a pinch of salt, and give it a good stir.
Cook the teff: Turn the heat to high and bring the mixture to a boil. Once boiling, reduce the heat to a gentle simmer. Cover the pot and cook for 15 to 20 minutes. Check it at the 15-minute mark. The water should be fully absorbed, and the teff should have a soft, slightly creamy texture. Stir often, especially as it thickens, to prevent it from sticking or burning.
Let it rest: When the teff is cooked, take it off the heat. Keep the lid on and allow it to rest for 5 minutes before serving.
Notes:
Option to top with fruits or nuts and seeds as you would with other types of porridge.