- firstly, in a large bowl break 6 slices of potato into small pieces. 
- add ¼ cup rava, ½ cup rice flour, ¾ cup curd. 
- also add 1 onion, 1 tsp ginger paste, 1 chilli, few curry leaves, 2 tbsp coriander, 1 tsp cumin and ½ tsp salt. 
- squeeze and mix well. 
- mix until a soft dough is formed. if the mixture is dry, you can add a tsp of more curd. and if it is sticky, break another bread slice. 
- now grease hand with oil and pinch a ball sized mixture. 
- flatten slightly, and make a hole in the centre. 
- deep fry in hot oil keeping the flame on medium. 
- stir occasionally, until the vada turns golden brown and crisp. 
- finally, drain off and enjoy bread medu vada with tomato sauce or chutney.