Heat oil in a kadai or pan & fry the chopped onion on medium heat for 5 mins till it is light brown.
Add the Onion-Spice Paste and fry for about 2 mins on medium heat. Continue to fry it for another 3 mins on low heat till oil separates.
Now add the Ginger garlic paste, mix and fry for 2 mins on low heat.
Add the Turmeric, Red Chilli and Coriander Powder, mix and add a splash of water and fry on low heat for 2 mins.
Add the chopped tomatoes, give a mix and add a pinch of salt . Continue to cook it on medium to low heat for around 5 mins till the tomatoes are soft.
Now add the chicken, give a mix and fry/bhunno it on high heat for 2 mins.
Add 1/2 tsp Garam Masala Powder & 1 tsp salt, mix well and bhunno/fry it on medium heat for around 5 mins. Continue to fry for another 5 mins on low heat till the chicken is browned and oil separates.
Add the whisked curd/yogurt on low heat, mix well and continue to cook on low heat for 5 mins stirring till the yogurt is cooked.
Now add the chopped coriander & mint leaves, mix well and cook for around 2 mins.
Add 200 ml water, mix and cover & cook on low heat for around 15 mins till the chicken is tender.