This recipe is a a bit thinner than I like and also the 4 cloves of minced garlic is a bit too strong, of course we get some really big cloves of garlic. I added another 1/4 cup of parmesan cheese since we like things cheesey. The second time I made it I used 2 teaspoons of flour mixed into the sausage, garlic and butter before adding the heavy cream and it make it more like an alfredo with sausage (since I still doubled the parmesan).
UPDATE: I find that adding 1 teaspoon of flour added to the meat works great in getting it thicker without being too thick. Still add more parmesan cheese than the recipe calls for but adding just 1 tablespoon of parsley gives it nice color since it didn't really do anything for the flavor.