This is my personal rendition on a favorite from Quebec. The addition of pumpkin to ordinary mashed potatoes gives them an nice earthiness that goes well with roasted poultry or other autumnal fare. I have not tried it with canned pumpkin but will experiment eventually. Though I don't cook much with butter, you should feel free to add some more to suit your taste.
Besides adding a sweet nutty flavor to dishes, pumpkin is a ready source of vitamin A, which boosts the nutrition content of this offbeat chili. Garnish each portion with a dollop of sour cream and chopped cilantro.