MW the chopped white pumpkin for 6 mins. Keep it aside.
In a bowl take the curds and beat along with salt and turmeric powder.
For the ground masala, chop coconut finely and make a paste along with cumin, green chilies and ginger.
Heat oil in a nonstick pan, add all the seasonings. When it splutters, add the beaten curd, ground paste and the boiled vegetables.
Add a little water to the besan and keep aside.
When the curd mixture starts to boil, blend in the besan paste.
The mixture will thicken on boiling.
When it reaches the desired consistency, remove from heat and serve with rice.