Boil the potatoes, peel and mash them. Sift flour in baking powder and mix with potatoes, cumminseeds, coriander, green chillies, salt, red pepper, garam masala and water. Knead to a soft dough for five minutes. Shape into 20 small balls. Roll out on a floured board. Deep fry bhaturas in hot oil till golden brown on both sides. Serve with channa or zeera potato.