Heat oil in a kadai or pan and add the sliced onions.
Sauté the onions for 12-14 mins on medium heat till golden brown.
Now add the marinated chicken, sliced tomatoes and chopped mint leaves. Mix well and fry on medium heat for 5 mins.
Continue to cook on low heat for 5-7 mins till the tomatoes are soft & oil separates.
Now add 4 tbsp of thick coconut milk & 200 ml of water, season with 1/4 tsp salt.
Mix well and cover & cook on low heat for 20 mins.
Garnish with chopped coriander leaves.