For the Masala
Roast all the masala ingredients together, except coconut, until golden. Allow to cool and take them in a blender. Blend adding fresh coconut and a little water, to a fine paste.
Heat a pan, add half a cup of water, add steamed yam, turmeric powder, salt, masala paste and kokum and mix well. Add 1½ cups water and let the mixture come to a boil. Cook for 5 minutes. Turn the heat off. Add curry leaves or coriander leaves as garnish and serve.