Sauté Cajun sausage until browned. Remove from pan.
In the same pan add the sliced vegetables and sauté with drippings from the sausage. Remove when tender.
Add the butter until fully melted then pour in the heavy cream bring to a simmer.
Add the parmesan cheese in small portions and mix until smooth.
Add Cajun seasoning and wisk.
Add sausage & vegetables.
Fold in the cooked pasta and adjust seasonings to taste.
Garnish with thin cut green onion.