Roast the pumpkin rather than boiling it if you have the oven on anyway; the difference between the two versions is larger than any ingredient you could add. Use less stock than looks right — you can always let it down, and a thin pumpkin soup cannot be rescued.
It did not make it into the plan for these seven days.
The method above is what decides the dish, not a step-by-step recipe. The link runs a web search on the name: this page has no vetted sources of its own, and will not invent any.