Over medium heat brown the sausage breaking into small bits. Drain fat. Add the onion, garlic, Italian seasoning and mushrooms and sauté until vegetables are cooked.
Add the canned pumpkin and the broth, stirring to mix well. Cook at a low simmer for 20-30 minutes.
While the Stroganoff is simmering prepare the pasta according to package directions.
Remove from heat and stir in heavy cream, sour cream and water.
Serve over Davinci Bow Tie pasta, garnish with sliced scallions.