Take a pan and boil onion with very little water (almost half of a cup) for 10 mins.
In a blender, blend boiled onions. Always try to use best blender for smooth blending like cuisinart hand blender.
Put oil in the pan and add onion paste, garlic and ginger paste, salt, red chili powder, coriander powder and turmeric powder. Saute all the spices and paste for 2-3 mins.
When smell starts to come from the paste, add beef and water in it. The quantity of water is just enough to cover the beef.
Now cover the pan and leave it to cook on high flame until the water starts to boil. After that slow down the flame and cook for 45-50 mins or until meat become completely tender.
In a separate pan boil potatoes for 20 mins.
When meat become done add boiled potatoes, cumin powder, black pepper, hot spice, crushed fried onions and nutmeg and mice powder.
Leave it for farther 5-8 mins on low flame till oil starts to appear on the surface.