Heat oil in a pan or kadhai.
Add the cut green chillies & curry leaves, give it a mix.
Now add the chopped onions and fry on medium heat for 10 mins till it starts turning brown.
Add the ginger garlic paste and fry on low heat for 2 mins.
Now add the marinated chicken and bhunno/ fry on high heat for 2 mins.
Continue to bhunno/ fry on medium heat for another 4- 5 mins till the chicken pieces are browned.
Now add the ground spice powder, give a mix and add a splash of water. Add salt, 1/4 tsp or to taste & mix.
Continue to fry/ bhunno on low to medium heat for 5 mins till it cooks & coats the chicken pieces.
Add the chopped tomatoes and mix & fry on medium heat for a minute.
Now reduce the heat to low and cook covered for 10 mins till the tomatoes are soft and pulpy (saucy consistency).
Add 150 ml water, give a mix and cook covered on low heat for another 10 mins till chicken is tender.