Clean wash mutton with plain water, drain water and keep aside. Peel shallots for making masala paste. Keep all ingredients ready for making masala paste.
In a clay pot add 2 tsp sesame oil add 1 tsp fennel seeds, 1 tsp cumin seeds, 2 tsp coriander seeds, 1/2 tsp pepper corns, Add peeled and chopped shallots 20-25 or 200g. Saute well in oil add 5-6 red chilly and mix well.
Add 1 tsp of red chilly powder and saute in oil, this gives nice taste and color to the kuzhambu. Saute everything well till nice brown color. Switch off and cool down the mixture. Transfer to mixie jar and grind to smooth paste and keep aside.
Lets start making kuzhambu. Keep a pressure cooker on the stove add 2-3 tsp sesame oil add green chilly and few curry leaves, Add 1 tsp ginger garlic paste. If you don't have ginger garlic paste add the 5-6 garlic and 1/2 inch ginger while making masala paste.
After sautéing the ginger garlic paste lets addd 4 medium sized tomatoes lengthwise chopped to the cooker and saute till mushy. Add 1 tsp salt for the kuzhambu. The tomatoes should become as paste then lets add the prepared masala paste and saute in oil for 2 mins.
Next lets add the cleaned mutton pieces with the bone marrow to the cooker and give a quick mix. Let the mutton pieces leaves water, cover and cook for 2 mins.
After 2 mins lets add water to the kuzhambu adjust water according to your wish. If you need thick kuzhambu add less water. Check for salt and spice adjust accordingly. Cover the pressure cooker and cook for 4-5 whistles in medium flame.
When the bone marrow gets cooked along with the kuzhambu it gets nice flavor and taste. Its a delicacy and bone marrow is very flavorful and high in fat. Its really good for boosting immunity. Mutton Nalli is also called as “Mutton Bone marrow” in English It contains a great source of omega 3 fatty acid which has essential for efficient brain functioning.
After the pressure subsides open and check whether the mutton pieces are cooked well if not, switch on the stove and boil in low flame for some more time without closing the lid. Finally add the chopped coriander leaves and serve hot with rice. Not only rice it suits idly, dosa, chapathi etc.