heat oil in a kadai and crackle mustard seeds and cumin seeds.
further add urad dal, chana dal, asafoetida, turmeric powder and mix once.
a handful of curry leaves is added and fried until the leaves are crisp.
add red chillies, chopped onions, chopped green chillies and fry until slightly brown.
add chopped pumpkin pieces, salt, chilli powder and mix well. fry for a minute.
add a little water, close and cook until pumpkin is soft.
open and mash it slightly with back of the ladle. mash it here and there.
lastly, add tamarind water, 2 cups water and give it a good boil.
serve fresh and hot with rice.