I've made this so many times in my adult life, I was SHOCKED to not find it on the blog!
Meanwhile, cook sausage in olive oil. Brown 5 minutes.
Add 3/4 cup white wine (or beer) and reduce.
Add 3/4 cup heavy cream (or milk and butter), 3 tablespoons mustard, crushed red pepper flakes, and simmer.
Add pasta and some basil.