Heat oil in a pressure cooker or deep pan.
Add chopped onions and sauté until golden brown.
Add ginger-garlic paste and cook for 2 mins.
Add turmeric, red chili powder, and 2 tbsp of the prepared sauji masala.
Add chopped tomato (if using) and cook until soft.
Add mutton pieces, mix well, and cook for 5–7 mins until sealed and coated.
Add salt and enough water for desired gravy.
Pressure cook for 3–4 whistles or simmer in a heavy pot until mutton is tender.
Check seasoning, garnish with coriander, and let it rest for 10 mins before serving.