Take besan and. suji and pass it through a sieve.Add turmeric powder, salt, sugar and citric acid. Whisk everything well. Add 1 cup of warm and make a smooth lump free batter. Add more water if needed. Add oil, grated ginger and mix well again. Leave it aside to ferment for 10 minutes. Arrange a stand in a large pan or steamer. Add 1 1/2 water, cover and boil for 10 mins.Brush a thali.