Peel and chop bottle gourd into a medium size pieces. Wash them well. Add them to a pot.
Add in washed moong dal and cover it with water. Season with salt and mix well. Bring it to boil, simmer and cook for 15 to 20 mins till the dal is cooked.
Take grinding ingredients in a blender, add water and make into a smooth paste.
Add this to the dal mixture and mix well. Cook this for 5 mins.
Now make seasoning. Heat oil and crackle mustard and curry leaves.