Clean chicken and cut it into medium pieces, keep it aside, now in a grinder add 2 types of red chilly, ginger, garlic coriander seeds, cumin seeds, 2 tsp vinegar and blend it into a smooth paste.
In a pan heat oil, and add to it chopped onions, saute it till it gets golden brown, now add the ground masala and also saute it till it leaves oil from edges. Now add the chicken and mix it well in masala for 10 to 15 min now add little water and let it simmer for some time.
Now in another pan dry roast grated coconut till it becomes golden brown, cool it and just crush it with your hands and add it to simmering chicken, keep it on flame for another 5 to 7 min, now garnish it with fresh chopped coriander.
Spicy chicken is read to eat, it tasted good with Naan or peas pulav