Clean and wash the lamb rib and neck pieces with the bones and keep aside.
Peel and thinly slice the onions. Wash the channa dal. Pluck the gonkura leaves only (no stems), wash, drain, chop them and set aside.
Add 2 tbs of oil to the instant pot in the sauté mode on high followed by half of the sliced onions and fry them till soft and translucent.
Add 1 heaped tbs ginger garlic paste, 1 tsp turmeric powder, 1/2 tsp kashmiri chilli powder and 1 tsp coriander powder, give it a stir then add the lamb pieces and roast them well in the onion masala. Add 3 whole green chillies, 1 tbs channa dal and 1/2 cup water then close the lid. Cancel the sauté mode and pressure cook on high for 15 minutes till tender. The valve should be turned to sealing position after closing the lid. When done let the steam vent out on its own.
When all the steam is released on its own, switch off the instant pot, open the lid and empty the contents of the instant pot in a dish. Lightly rinse the pot inside with a little water which you can add to the lamb curry. Set aside.
Switch the instant pot on high in the sauté mode again. Heat one tbs of oil and ghee, sprinkle the mustard seeds and let them crackle, add the deseeded dried red chilli, cumin seeds, then crushed garlic cloves with their peel and curry leaves followed immediately by the chopped gonkura leaves. Fry them well then add 1/2 cup water and simmer for 5 minutes.
Blend the gongkura with the other ingredients using an electric hand blender. Now throw in the remaining 3 whole green chillies and simmer on low sauté mode for 5 minutes. If you like it more spicy then you could blend in the green chillies with the gonkura leaves.
Finally add the cooked lamb curry to the instant pot with the gonkura curry, sprinkle some garam masala powder, chopped cilantro, a little water and simmer on low for 5 minutes.
As a finishing touch heat a little ghee in a tempering pan, throw in some dried red chillies, mustard seeds and curry leaves then add the tempering to the gongkura lamb curry .Serve hot and enjoy with steamed jasmine rice and ghee. So yummy and delicious!