In a bowl, take the rice flour, curds, Green chillies, Cumin seeds, Coriander leaves and salt. Mix well. Then add the mashed potatoes and sufficient water to achieve a dosa like consistency. Using your hands, mix well to ensure no lumps are formed. If you have a blender, you can blend the flour with mashed potatoes with water and then add the rest of the ingredients.

Now we are set to make the dosas! Heat a Tawa, smear oil and once the pan is hot, pour a ladleful of batter in the centre and spread like the regular dosa. If this doesn't work out, you can drop in a circle, then try to make a dosa from it.

Get the flame to medium, so that it gets cooked well. If it's not cooked fully, you will not be able to flip it to the other side. So sprinkle oil and wait till its cooked well. Then flip to the other side and cook its done.

This goes well with coconut or groundnut chutney. Even Podi will be great.