Heat a pan with split green gram lentils and roast them in medium heat till raw smell subsides and aroma wafts out. Pressure cook the lentils adding 1 cup of water till they turn soft. I have cooked for 3 whistles and in simmer for 2 minutes.
Method
In the same pan add a tsp of ghee and roast the rava for about 4 minutes in medium flame. Transfer the rava in to a bowl and heat the same pan adding oil, cumin seeds and curry leaves.
When the cumin seeds change in color throw in ginger, crushed black pepper, cashews and slit green chillies. Saute for a while. Then add 1 and quarter cup of water, turmeric and salt. Bring it to boil.
Next include cooked moong dal and carefully pour roasted rava while stirring it continuously. Make sure rava doesn't form any lumps. Finally garnish with grated coconut.
Drool-worthy rava pongal is ready to relish with coconut chutney.
Notes
While roasting rava and moong dal, ensure the color doesn't change to brown.
If you prefer, add ghee instead of oil and make the pongal only using ghee.
If you reduce oil, the pongal loses it's texture and becomes like paste.