Chicken Masala chettinad style

This is another version of chettinad chicken masala. In the earlier version you will find a chicken gravy.My family like this. Try and see.
Ingredients
Chicken-750 gms
Small onion 30 or big onion 2
Tomatoes-2
Garlic 20 pods

To grind No1
Ginger ½ inch piece
Small onion-10
Garlic-10 pods
Green chillies-2
Chillie powder-1 table spoons
Coriander powder-2 table spoons

To grind No2
Coconut grated-5 table spoons
Cashew nut-5 or kasa kasa-2 teaspoons
Fennel seeds-1 teaspoon

To season
Cinnamon-2 pieces
Fennel seeds-1 teaspoon
Clove-2
Cardamom-2
Birinji leaf-little
Mint leaf-handful
Curry leaf little

To marinate
1 teaspoon kuzhambu milagai thool(the powder used for sambar)
Salt-1 teaspoon
Curd little
Ginger garlic paste-1 teaspoon

Method
Mince the onion, garlic and tomatoes.
Keep the kadai in the stove. Season the curry with the items given in ‘to season’ in 2 tablespoons of oil.
Add the onions and saute with a pinch of salt for 3 minutes.
When the onions turn transparent add the garlic, sauté for some time
Add the chopped tomatoes. Sauté till the whole thing gets smashed.
Add the grinded paste of items given in No 1. Sauté it for a while.
Now add the chicken pieces and nicely mix all the masala over the chicken pieces.
You can see lot of water coming out of the chicken. Reduce the flame and cook for 10 to 15 minutes.
Once you find that the chicken pieces are almost cooked increase the flame so that the gravy becomes thick.
Once the curry gets thick add the masala grinded with the items given in No2 and mix nicely
Cook for another 5 minutes till the oil separates.