Yes you can make your own filling from scratch!
Sugar Pumpkin
Select one sugar pumpkin per pie (these are small pumpkins). Preheat oven to 325 degrees F (165 degrees C)
Remove stem and cut the pumpkin in half from the stem to base
Save the seeds to roast. Here is the link to how to roast seeds
Place cut side down on a cookie sheet
Bake in the preheated oven 1 – 1 1/2 hours or until tender. This is what they will look like
Scrape pumpkin meat from shell halves
Did you know you can make pumpkin soup and serve it in the shells?
Puree in a food processor and use right away or store in the freezer
In case you wanted to know my 2 little pumpkins gave me 4 1/2 cups of puree