Cook pasta in a large pot of water according to box and set aside. Reserve the pasta water.
In a large skillet brown the sausage and add in the sage. Set on a plate to drain excess oil when done.
In the same large skillet over medium-high heat, add a drizzle of olive oil then sauté the shallot for 2-3 minutes. Scraping up the browned bits of sausage so it gets incorporated into the sauce!
Add the pumpkin, garlic bullion base, and 1 cup of reserved pasta water (or chicken stock). Whisk until smooth and combined.
Reduce the heat to low and add in the creme fraiche and stir. At this time depending on the thickness of the sauce, you may want to add another ladleful of pasta water as well.
Sprinkle in salt and pepper then stir in the pasta.
In a baking dish add the pasta and with the sausage, and shredded cheese blend.
Broil for 2-3 minutes until the cheese is melted and starting to turn golden brown.
Add a little extra parmesan cheese on top and enjoy!