Kappa Vevichathu

First using a knife peel the skin of the tapioca. You have to remove both the thin brown color skin and thick pink color skin. Then wash it properly and cut it into medium size pieces. Then cook the tapioca pieces by adding enough water, till the water starts to boil. Then drain the water and then again start cooking it by adding fresh water along with 1/2 tsp of turmeric powder and salt till the tapioca becomes soft.Then again drain it using a colander, but this time you have to drain it nicely and keep it aside.Meanwhile grind coarsely grated coconut, green chillies, dry red chillies, garlic, shallots, cumin seeds and turmeric powder. Just 3-4 pulses in mixer grinder is enough. No need to add water.Then transfer the cooked tapioca pieces to a pan and keep it in a very low flame. This will help in removing any water left in the tapioca pieces even after draining. Then add ground coconut mixture and using the back side of a wooden spoon, mash the tapioca pieces while mixing and remove from the flame. Then heat oil in a pan and add mustard seeds. When it crackles, add curry leaves and dry red chillies and pour this to the cooked tapioca.