Mix 125g onions, turmeric, red chilies, cumin seeds, ginger-garlic paste and blend to a fine paste.
Heat oil in a pan, add onions and fry well. Also add mutton pieces and cook for 2-3 minutes.
To this, add the above onion paste, salt and cook for another 5 minutes or until done by covering.
Remove from heat, sprinkle chopped cilantro and serve with sliced onion rings on it.