Chicken Chettinad

how to cook Chicken Chettinad ?
Ingredients

1 kg chicken, skinned-cut into medium size pieces
1/4 kg onion - finely sliced
2 big tomatoes -cubed
5 tbsp oil
1 inch cinnamon stick
4 cloves
2 cardamoms
1 tsp each cumin, jeera
1 tsp turmeric powder
Salt to taste
4 tbsp coriannder leaves chopped
For Grinding
6 shallots (small onions)
4 inch ginger
6 - 8 pods garlic
1 tsp each cummin seed, jeera
1 tsp black pepper corns
10 dried red chillies
1 cup coconut chopped
Method
Marinate the chicken pieces in ground ingredients for about 20 minutes.
In a non-stick pan, add 5 tbsp oil and heat it.
Add cloves, jeera,turmeric powder and fry for 30 seconds.
Add the sliced onions and fry till it becomes pink.
Add tomatoes and fry till oil separates.
Now add the marinated chicken and turmeric powder and mix it throughly. After 10 minutes add enough salt and cover and cook it till done.
If needed add 1/2 cup water while cooking.
Garnish with coriander leaves.