There are some lovely recipes for pumpkin soup if you ever score a good deal on the canned stuff. I have made it using homemade chicken broth (2-4 cups) one of the big cans of pumpkin puree, a whole package of low fat cream cheese (instead of heavy cream) and a touch of garlic + salt and pepper to taste (but we adore the curry + a hit of cayenne pepper and while we don't eat much bread, garlic bread or croutons are divine with creamy soups like this. Or naan bread). We use big cans of pumpkin puree. Not the ones that are sweetened and have pie spices - the ones that have ONLY pumpkin as the ingredient. You can still make pie from it, but you don't want sweeteners and other junk for savory dishes besides not being able to control the crazy amount of sugar that they put into the pie filling versions.
I learned how to make curried pumpkin soup when I hit a dented can sale on them - 29¢ per giant can (regularly $2-3 a can). I bought em out and now have the basic ingredients to make a huge pot of pumpkin soup any time (always have chicken stock frozen or can make with veggie ends/bones also saved in freezer, cream cheese usually lasts for months unopened so we usually have a couple in the fridge, pumpkin + spices in the pantry)
Can also add in a handful or two of cut up carrots if you're blending it up and get it really rich in the beta c veggies. Adds sweetness. You likely could get away with adding a half to full cup of cauliflower as well since it just takes on the flavor of whatever it's with, and can blend it smooth easily once simmered soft for a few hours.
Many of the root veggie soups recipes up on allrecipes.com can be improved with a block of cream cheese (we get the neufchatel version at Aldi for the lower fat option). If it calls for any type of cheese/cream, wouldn't hurt to try it. Just have to simmer and stir well, or use a blender (I have a stick blender) to get it to dissolve.
Pumpkin is a WONDERFUL veggie/fruit - one of the more difficult ones to get in a diet. Lots of fiber, vitamins, beta carotene... love soup. If anyone in your family has serious allergies, there is a tiny chance it could trigger them (hadn't realized this but just looked at nutritional benefits and saw a warning that it does rarely happen so thought I'd include)