Mix the yeast with half a cup of lukewarm water and keep aside for ten minutes.
Mix the ghee (clarified butter) and the sugar with the flour. Add the yoghurt and dissolved yeast or the baking soda. A little more lukewarm water may be added if necessary. Knead well until the dough becomes soft and pliable. Use a little oil to knead well.
Cover it with a wet cloth and keep aside for four hours.
Heat the ghee in a frying pan. Make small balls and roll them, spread a little with your palms and fry in hot ghee until golden brown. Serve hot with Channa or choley (chickpea curry).