Wash the piece and leave the meat water to strain.
Put oil in a pan and fry the coconut to light brown.
Add curry leaves and saute the button onions, crushed ginger and garlic and saute for few minutes to remove the raw smell.
Lower the heat and add all the powders and mix well and saute for few minutes.
Add the beef, vinegar and mix well until the beef is coated very well with masala. After 5 minutes transfer to pressure cooker.
Add them to pressure cooker with curry leaves and cook on slow fire for 10 minutes to let the water come out and if needed add ¼ cup hot water and pressure cook till the beef is done. Usually it would be done with 2 to 3 whistles.