Potato and chicken curry - Bengali flavour masala for this spicy chicken curry - yellow gravy curry

Bengali Style Chicken Aloo Jhol Ingredients:- Chicken - 1.5 kg Potatoes- 1 kg Oil - 3 tb spn Onions - 200g Mustard - 2 tb spns Red chillies- Handful Whole Garam masala - 1 tsp Ginger garlic paste- 2 tb spn Turmeric - 1 tsp Coriander powder - 2 tb spn Garam masala powder - 1 tsp Curd - 400ml Salt - to taste Water - As required