Heat a pan on medium heat with 2-3 tsp of cooking oil when its hot add the mustard seeds. Allow it to splutter then add the cumin and whole red chillies, green chili shallots and sauce until shallots turn tender.
Add the curry leaves, chili powder, turmeric powder and tomato.
Finally add salt and cubed pumpkin pieces mix well and remove from heat.
Open the instant pot after natural pressure release stir well to mash the lentil well. Then add the prepared pumpkin mixture give it a good stir and put the lid and turn the nozzle to sealing mode.
To COOK --> Press MANUAL mode ---> 2 or 3 minutes
After natural pressure release open the lid and give it a gentle stir. Do not mash the pumpkin pieces.
Garnish with chopped coriander leaves.Serve immediately with any rice of your choice.