Peel the pumpkin and chop in pieces, heat butter in a kadai add onion slices, garlic chopped, pumpkin cubes and fry for a while. Add coriander stems.

Add water and boil till the pumpkin becomes soft.

Strain the water and add the pumpkin mixture to a blender and blend it smoothly.

Transfer to the kadai add the strained water add salt, pepper powder and vinegar and boil it, off the flame.