Wash and soak dosa rice, urad dal, fenugreek together with enough water for 2 to 4 hours. Grind this mix coarsely along with washed thin flakes/avalakki and water(thin flakes make the paddus soft). Consistency of the batter should be same as that of dosa.
Let it ferment for 8 hours. Fermented batter looks like this.
Method
Add salt to the batter and stir well.
Heat the paddu/ guli-appa pan on a medium flame. Add one tea spoon of oil to paddu moulds in the pan.
Pour the paddu batter to each mould up to only 3/4th level as the paddus need space to puff up. Add little oil on each of the paddu and cover the lid.
Let it cook in medium flame for 3 minutes and using a spoon turn them to cook the other side as well.
They should be cooked till they turn golden brown. Now paddus are ready. Serve them with chutney or sambar.
Note:
You can add chopped onions, green chilly paste, curry leaves and coriander leaves to the batter to make paddu | guli-appa spicy.