Preheat oven to 350°F. Grease a large cake pan or two 9-inch pans and set aside.
Boil water. In a small mixing bowl, pour water over the teff grain. Let it stand for 10 minutes. Combine dry ingredients in a large mixing bowl. Gently stir them together. Add the apple juice, lemon juice, oil, maple syrup, soymilk and the soaked teff grain. Mix all the ingredients together. Pour batter into prepared baking pans. Bake for 40 minutes.