Heat oil in a heavy bottomed vessel. Add the ground onion paste and stir fry for 5-6 mts. Add the washed mutton pieces and combine well. Cook for 8-10 mts or till oil seperates.
Add turmeric pwd and chilli pwd, combine. Cook for 2 mts. Add 2 cups water and salt and cook till the meat is three-fourth cooked. (you can use a pressure cooker)
Add the extracted tamarind pulp, along with a cup of water and combine well. Let the mutton pieces simmer in this tamarind base for 20-25 mts or till the meat is cooked and you get the desired gravy consistency.
Adjust salt. Garnish with coriander leaves.
Serve hot with white rice.
.Note: The cooking time will depend on the quality of mutton used. If its tough meat, it takes longer to cook. Adjust spice to suit your palate. The consistency of gravy should be more like a kurma gravy consistency.