boil chana dal with enough water and 1 teaspoon oil. grgind coconut with a little water into a fine paste. heat oil in a pan, add cumin and black gram and fry. add green chillies and curry leaves.now add chopped onions and brown lightly. add ground coconut and simmer .mean while slice mushrooms and saute till cooked .add the mushrooms to cooked coconut mixture. pour mixture into dal , mix well add salt simmer for 2 minutes and take off fire.