Step-by-Step Instructions

1. 1.Prepare Marination Base

   Whisk 1 cup of curd until smooth in a bowl.

2. 2.Mix Marination Spices

   Add salt to taste, 1 tsp garam masala powder, 1 tbsp ginger-garlic paste, 1 tsp turmeric powder, and 1 tsp red chili powder to the whisked curd. Pour a small amount of mustard oil into the mixture and mix all ingredients thoroughly.

3. 3.Marinate Mutton

   Place 1 kg fresh mutton pieces in a large bowl. Pour the prepared marinade over the mutton and mix well to ensure all pieces are coated. Marinate for at least 4-6 hours.

4. 4.Slice Onions

   Thinly slice 4 medium onions.

5. 5.Temper Mustard Oil

   Place a heavy-bottomed pan on medium heat and add 1 cup of mustard oil. Heat the oil until it reaches its smoking point (you will see smoke). Turn off the gas and let the oil cool down slightly. Then, reheat the oil.

6. 6.Caramelize Sugar

   Add 1 tsp sugar to the hot oil and stir continuously with a wooden spatula until it caramelizes and turns a dark brown color.

7. 7.Add Whole Spices

   Add the whole spices (2-inch cinnamon stick, 1 tsp black peppercorns, 1/4 tsp nutmeg, 2 bay leaves, 3 green cardamoms, 1 black cardamom, 4-5 cloves, 1 mace) to the caramelized sugar and oil. Sauté for a few seconds until fragrant.

8. 8.Sauté Onions

   Add the sliced onions to the pan. Sauté the onions on medium heat, stirring frequently, until they turn dark brown and translucent. This process helps build the base flavor and color for the curry.

9. 9.Add Remaining Ginger-Garlic Paste

   Once the onions are dark brown, add the remaining 1 tbsp ginger-garlic paste. Sauté for a few minutes until the raw smell disappears and it blends with the onions.

10. 10.Add Powdered Spices

    Add 1 tsp turmeric powder, salt to taste, 1 tsp red chili powder, and 1 tsp garam masala powder to the pan. Mix all the spices well with the sautéed onions and ginger-garlic paste.

11. 11.Begin Slow Cooking (Kosha Technique)

    Add the marinated mutton to the pan. Mix thoroughly with the onion-spice mixture. Cover the pan and cook on medium-low heat for 20-25 minutes without adding any water. The mutton will release its own juices. Stir occasionally to prevent sticking.

12. 12.Continue Roasting Mutton

    After 25 minutes, uncover and continue roasting the mutton, stirring frequently and scraping the bottom of the pan, until the oil starts to separate from the mixture and the color deepens significantly. This stage takes about 30 minutes. Ensure the flame is medium-low to prevent burning.

13. 13.Add Hot Water

    Once the mutton has roasted well and the oil has separated, add enough hot water to just cover the mutton pieces. Mix well.

14. 14.Simmer Mutton

    Cover the pan and simmer on low heat until the mutton is tender. This will take approximately 45 minutes to 1 hour, depending on the quality of the mutton. Check for tenderness by taking a small piece out, cooling it in water, and trying to break it. If it's still tough, continue cooking.

15. 15.Final Roasting and Finishing

    Once the mutton is tender, continue cooking for another 30 minutes, stirring occasionally, until the gravy thickens to your desired consistency and the oil floats on top. Add 1.5 tbsp ghee and 1 tsp garam masala powder. Stir well to combine.

16. 16.Serve

    Serve the hot Kosha Mangsho with rice, roti, or paratha.