Chicken roast Kerala (nadan ) style

My eldest sister (Asha) is a very good cook. She cooks traditional Kerala dishes fantastically. I have learned so much dishes from her. This is one of the dish which I learned from her.
Chicken Kerala (nadan) style
Ingredients

•         Chicken-1kg (cut into 8pieces)
•         Ginger(2inch piece)-1
•         Garlic -1pod
•         Shallots-1/4cup
•         Coriander powder-3tsp
•         Chili powder-1 1/2tsp
•         Garam masala powder-1tsp
•         Pepper powder-1tsp
•         Turmeric powder1tsp
•         Coconut milk (thick)-1cup
•         Salt to taste
•         Onion -2(medium size)
•         Potato-1medium size
•         Curry leaves 2sprigs
•         Coconut oil -half cup
Method
•         Grind ginger garlic and shallots along with all the masala powders. 
•         Cook the chicken with the ground masalas and coconut milk. 
•         In a pan, fry the onions which is thinly cut, to golden brown and keep aside.
•         Fry the curry leaves and the potatoes which is cut into wedges and keep aside.
•         Take out the chicken pieces and fry it in batches to light brown and keep aside.
•         Put the onions and the gravy to the pan and stir it till the oil turns out.
•         Add the  fried chicken and stir it for 2min and take out into a serving bowl and garnish with potato wedges and curry leaves