Remove the seeds and the stringy portion of the pumpkin and put it aside. Peel the pumpkin and cut up the flesh into small chunks.
Heat the oil and add the cumin seeds.
When the cumin seeds start to sizzle add the pumpkin, coriander powder, turmeric and salt.
Add 1 tbsp water and mix well.
Cover the pan and cook for about 10-15 minutes. Stir about every 5 minutes and check if cooked. The pumpkin is cooked when you can easily mash it with a spoon.
When the pumpkin is cooked turn off the heat, add the sugar and mash it well with the end of the spatula.