Remove the seeds and skin from the sweet pumpkin and cut it into small pieces.
Roughly chop the walnuts.
Steam the pumpkin and mash it.
Put the mashed pumpkin and chopped walnuts in a pan and stir-fry over low heat.
Season with salt and low-sugar sweeteners like stevia if needed.
When the mixture thickens, let it cool and transfer to a container.