Heat 1 tbsp oil in a kadai or frying pan and add chana dal
Fry until they are golden
Add green chilli, ginger and garlic. Saute for a few minutes
Add the bottle gourd peel and salt. Mix well, cover and simmer for 8-10 minutes until the peel is completely cooked
Turn off the flame. Add coconut and tamarind pulp, and mix well
Let the mixture cool down completely
Grind into a smooth paste by adding very little water
To make the tempering, heat 1 tsp oil and add mustard seeds
Once they splutter, add the remaining tempering ingredients. Saute for a few seconds
Pour the prepared tempering onto the chutney and serve