Prepare the pasta as directed on the package. Drain and set aside.
In a small saucepan, melt the butter and whisk in the flour until fully combined. Cook for 1 minute, whisking constantly. Add the garlic and continue cooking for one minute.
Slowly pour in the milk, ½ cup at a time whisking constantly until each addition is fully incorporated.
Once all the milk is added, continue cooking until thick and bubbly. About 5-10 minutes
Turn off the heat, and stir in the pumpkin, cream cheese, sage, thyme, salt, cinnamon and pepper until the cream cheese has melted and the mixture is smooth.
Pour desired amount of sauce over the prepared pasta, top with parmesan cheese and serve.