Wash and half cook taro in a pressure cooker for a whistle using enough water.(Make sure not to fully cook or over cook it as it might become smashy) Drain away the water and peel the skin off.
Slice taro lengthwise and keep it to dry for about 20 minutes.
Deep fry in oil in medium flame. Make sure to turn over the sides so as to cook evenly in both sides.
Once its cooked and golden brown in colour, transfer to a plate.
Crush small onion, fennel seeds, turmeric powder and all purpose Chilli Powder (Kuzhambu milagai powder) in a blender. Do not grind to a smooth paste. Just crush it.
In a pan heat oil, splutter mustard, urad dal and curry leaves. Add crushed masala paste and saute.
Now add 2 tbsp of water, mix properly and allow it to boil.
Add fried taros and mix with the masala evenly.
Tasty taro roast is ready to be served with rice. Goes good as an appetizer also.