Cook pearled or dehulled sorghum in boiling water till the grains become smooth and palatable.
It can also be prepared in a pressure cooker for 5-10 minutes.
Grind the soaked sorghum grain and black gram dal together into a fine batter. Add salt for taste and allow it to ferment.
Apply a teaspoon of oil on the preheated dosa-making tawa and pour the batter on it, spread with a scoop into a thin round shape. Fry till crisp dosa is obtained.