Steps
1. Mix together the potatoes, onion, chilies and ginger.
2. Add the thick coconut milk, and stir into the mixture to give a consistency of thick porridge.
3. Add the beaten yoghurt, salt to taste and mix well.
4. Put on the fire, bring to the boil and serve.

Comments
As a variation, just before serving, you can add a few curry leaves, a little mustard seed and two dried chilies. that have been fried and roughly ground.

Source
Food and Agriculture Organization of the United Nations (1990), Roots, tubers, plantains and bananas in human nutrition, ISBN 92-5-102862, Rome

Serving
6