Clean, wash and drain the mutton pieces and keep aside..
Fry turmeric powder, kashmiri chilly powder and coriander powder together in a pan without oil to remove the raw smell and taste of these powders.
Marinate the mutton pieces with the fried masala powders, 1 tsp garam masala and salt. Keep aside.
Heat coconut oil in a kadai and saute sliced shallots, chopped ginger & garlic and curry leaves till shallots becomes soft. (Instead of shallots, you can use 4 big onions).
Add chopped tomato and saute till it is mashed well in the masala.
To this, add the marinated mutton pieces along with remaining 1 tsp garam masala and required quantity of hot water.
Cover and cook it in a medium flame till the meat is cooked well and the curry reaches a medium thick gravy consistency. Refer tips.
Make sure there is enough water while cooking the dish.
Serve hot with steamed rice / kappa / chappathi / appam / idiyappam.