This yummy Indian sandwich is a popular street food. The recipe starts with a potato puree combined with onions, turmeric and ginger. Form the spiced mixture into balls and wrap it around a fritter made of chickpea flour, turmeric and chili peppers. All that's left is to fry up the vegetarian balls and slide them into an Indian bread bun, served with green chilies and various chutneys on the side.