Heat the olive oil in a large skillet over medium-high heat. Add the sausage and cook for 2-3 minutes to sear slightly, stirring partway through.
1 Tablespoon extra-virgin olive oil, 1/2 pound andouille sausage
Add the onions and cook for 5 minutes, stirring occasionally. Add the sliced peppers and garlic. Continue to cook and stir for another 3-5 minutes until onions have softened and peppers are tender-crisp. Transfer the sausage, peppers, and onions to a plate and set aside.
1 small red onion, 2 red or yellow bell peppers, 3-4 cloves garlic
Add the diced tomatoes and water to the pan, scraping up any browned bits from the bottom with a wooden spoon. Bring to a boil over high heat, then add the pasta. Cover and reduce the heat to medium-low, simmering until the pasta is al dente and has absorbed most of the liquid.
15 ounces diced tomatoes, 1 1/2 cups water, 8 ounces casarecce pasta
Meanwhile, blend the milk, cream cheese, Cajun or Creole seasoning, smoked paprika, and flour in a blender.
2 cups milk, 3 ounces cream cheese, 1 teaspoon Cajun or Creole seasoning, 1/2 teaspoon smoked paprika, 2 Tablespoons all-purpose flour
Melt the butter in a large pot over medium-high heat. Add the garlic and cook until fragrant, about 60 seconds.
2 Tablespoons salted butter, 1 teaspoon minced garlic
Add the blended milk mixture to the garlic and butter. Cook and stir until slightly thickened enough to coat the back of a spoon. Remove from heat and stir in the Parmesan cheese.
1 cup freshly grated Parmesan cheese, plus extra to garnish
Add the sausage and peppers along with the cooked pasta to the sauce, stirring until everything is combined.
Serve with additional Parmesan cheese and chopped parsley sprinkled on top.
Freshly chopped parsley