Cook the tapioca by adding salt as required. You can pressure cook it for two whistles.
Take a pan and add butter.
Then add cooked and drained tapioca.
Saute the tapioca in butter for 2-3 minutes.
Now add coconut milk and combine well. Bring it to boil
Add pepper powder, mix well and remove from the flame.
For seasoning the butter kappa, heat oil in a tadka, splutter mustard seeds and add chopped shallots into it. When it turns to light brown in color add dried red chillies and few curry leaves.