Add coriander powder, chillie powder, turmeric, salt, the ground spices and vinegar. Beat the yogurt with water, then add it to the meat. Cook covered in low to medium heat till the meat is soft and well cooked.
Add the flour dissolved in the 4 tbsp water towards the end and cook for a few minutes. The flour mixture thickens the gravy.
This beef stew or Nihari is served hot with rice or flatbread