Step 1 Wash and peel the marrow. Reserve the skin to make another dish. Chop the marrow into bite size pieces.
Step 2 Rinse the red split lentils in water thoroughly. Pressure cook them for 3 whistles with enough water to cover the lentils, 1/2 tsp of turmeric powder and salt. If you do not have a pressure cooker, cook the lentils in a saucepan with 2 cups of water for 8-10 minutes.
Step 3 Heat oil in a pan, add chopped garlic, ginger and onions, saute till the onions become translucent. Add in tomatoes and saute for another 2 minutes.
Step 4 Turn the heat down, add the spices and stir for 30 seconds. Pour in half a cup of water, cover and let the mixture cook for 2 minutes.
Step 5 Now, add in marrow and pour in the cooked dal. Combine everything together. If the curry is too thick, add more water. Cover and cook for 6-8 minutes.
Step 6 In another small pan, heat ghee. Add cumin seeds, remaining turmeric powder and dry red chillies. Saute for a minute and pour this over the curry. Mix well and serve this delicious curry with rice or chapathi.