Soak Urad dal in a bowl in cold water for 15 mts. Boil 3 cups of water in a Pot. Add salt and Turmeric. Add Urad dal to water. Bring to a boil and let it boil for 15 minutes on medium/low heat. Turn off heat after 15 mts. You don't want puree of Dal.
Heat a pan. Add olive oil, butter or ghee. Add onions cook until light brown (about 2 mts.) Add Garlic, cumin seeds, crushed red peppers and Heeng. Cook 1 minute and add Dal to this mixture.
Add cooked Dal to this mixture. add Garam Masala. Let it sit for minute before serving and top with sliced green chillies.