Heat oil in a skillet. Add the urad dal. As the dal
starts to turn golden brown, add the cumin and mustard seeds. As they
start to pop, add the red chillies and curry leaves and fry for a
couple of seconds.
Add the bottlegourd pieces along with salt and 1/2
cup water.
Reduce heat to medium and cover and cook, stirring
occasionally, until tender. Add more water if needed.
When the bottlegourd is tender, add the red chilli
powder and saute until all the water evaporates.
Serve the bottlegourd curry with plain rice or roti
(phulka).