Heat a pan low heat. Add 2 tsps of ghee. When melted and hot add cumin, mustard, cahews, peppercorn, green chilies,ginger,curry leaves, turmeric, Asafoedita(hing) and saute for a minute.
Add 2 cups of water salt to taste and bring to a boil.
Add roasted Oats and cook for 2- 3 minutes.
Add cooked moong dal. Stir to combine and cook for another minute or so till oats are completely cooked. Add drained water from dal if it is too thick.
Adjust salt and add 2 more tsps of ghee on top. Pongal will be runny when turning off the heat.
Serve hot with chutney or sambhar.