Soak dal and rice together for 2 to 3 hours. Grind till coarse rawa consistency.(Batter should be thick. Do not add washed water.) Allow to ferment till next day. Before steaming add oil, ghee, pepper, cumin, curd and soda to the batter. Greas big cooker plates and pour batter for 1 inch thickness. Steam till it is cooked.(Approximately for 30 to 40 minutes). Serve hot.