In a bowl add semolina, salt, mix well. Slowly add water in it, mix well & cover it for 10 minutes. The batter will not be too runny & will have medium consistency. To it, add lemon juice, mix it & add Eno(right before steaming), give a slight stir so that Eno mix well & does not form bubbles in the batter

Then grease oil in your desired katori & put the batter on it. Heat water in a deep bottomed pan, add a stand in it & carefully place the idli katori in the stand & steam for about 15 minutes.