Cut all the vegetables lengthwise of 1/2 inch thickness.
Cook vegetables with water, salt and turmeric powder.
( Add salt only when veggies are cooked half way through)
:- Add turmeric powder only when the water with vegetables starts boiling.
Grind together the coconut, cumin seeds, curry leaves, small onions and a little curd or tamarind juice (as mango can be sour enough).
:- You can add greenchillies too for grinding , then avoid adding them to vegetables.
Once the vegetables are cooked, add the ground paste.
Cook Aviyal till the raw coconut is cooked.
:- Do not over cook the Aviyal, as the whole mix will dry up.
Once Aviyal is cooked, add coconut oil and mix well.
:- You can add tamarind instead of curd to make Kerala Aviyal.
:- Serve Aviyal with rice or chapathi.