Melt the butter in a large sauce pan. Add the pumpkin puree and thyme and stir well.
Cook for 5 minutes, stirring often. Add the heavy cream and mix well to combine.
Turn off the heat and add the Gorgonzola, pine nuts, nutmeg, cinnamon and pumpkin pie spice. Salt and pepper to taste. Add the pasta and serve with additional Gorgonzola and pine nuts sprinkled on top.