Heat the oil in a skillet or kadhai. Add the mustard seeds to it. Let them splutter. Add the asafetida, dried red chillies and curry leaves to it. After about 30 seconds, add the pinto beans to the pan.
Add salt and sauté well for a couple of mins. Add the coconut towards the end and give it a couple more quick stirs.
Switch off heat and enjoy with your evening cup of tea!