Mix all the ingredients for the khandvi (till salt in the above list) in a deep microwave-safe bowl. Microwave at 80% power for 4-5 minutes stirring in between. Again microwave for 3-4 min. at 80% power, stirring in between, until the mixture thickens.
Take out the mixture and spread it as thinly as possible on a thick polythene sheet with the help of a flat bowl. As it cools, cut into broad strips and roll them into small rolls and serve them in a serving dish.
For Tempering: Take all the ingredients (mentioned after salt and before coconut in the above list) for tempering in a small microwave-safe bowl and microwave at 100% for 2 min. Pour this tempering on the khandvi rolls in the serving dish.
For Garnishing: Sprinkle coriander leaves and grated coconut on the khandvi and serve with a smile.