Wash and soak the rice with all the dals in enough water for 2 hours.
When ready to grind, drain the water and grind to a coarse paste by adding enough water to make a batter of medium thick consistency.
Transfer to a bowl, add curds and mix well. Let it ferment for at least 5 to 6 hrs or overnight.
When ready to make, add in all the spices, pastes and grated bottle gourd and baking soda. Mix well and pour this into a greased baking tray.
Preheat oven at 180° C.
In a nonstick pan, heat oil, temper with mustard seeds, ajwain, hing, curry leaves, and sesame seeds.
Pour this seasoning on the batter. Bake in preheated oven for 1 hour or till the crust is deep golden. It took me about 45 mins to get baked.
Cut into wedges and serve with green chutney.