Preparation :

Step 1: Cook the Pasta

1. Bring a large pot of salted water to a boil.
2. Add the pasta and cook according to the package instructions until al dente.
3. Drain and set aside.

Step 2: Prepare the Sausage and Shrimp

1. Heat the olive oil in a large skillet over medium heat.
2. Add the sliced sausage and cook until browned and slightly crispy, about 4-5 minutes. Remove from the skillet and set aside.
3. In the same skillet, add the shrimp and cook until pink and opaque, about 2-3 minutes per side. Remove from the skillet and set aside with the sausage.

Step 3: Make the Sauce

1. In the same skillet, add a bit more oil if needed. Sauté the onion, garlic, and bell peppers until softened, about 5 minutes.
2. Stir in the flour (if using) and cook for 1 minute to eliminate the raw flour taste.
3. Gradually pour in the chicken broth while stirring to combine. Bring to a simmer.
4. Reduce heat to low and add the heavy cream. Stir well to combine.
5. Stir in the Parmesan cheese, Cajun seasoning, smoked paprika, and cayenne pepper (if using). Continue to cook until the cheese is melted and the sauce is creamy, about 3-4 minutes.

Step 4: Combine Everything

1. Return the cooked sausage and shrimp to the skillet. Stir to coat with the sauce.
2. Add the cooked pasta and toss everything together until well combined and heated through.

Step 5: Garnish and Serve

1. Sprinkle the chopped parsley over the top for a fresh touch.
2. Serve immediately with additional Parmesan cheese if desired.