For the pasta:

• 12 ounces linguine or fettuccine
• 1 tablespoon salt (for boiling water)

For the proteins:

• 1/2 pound medium shrimp, peeled and deveined
• 1/2 pound boneless, skinless chicken breast, cut into bite-sized pieces
• 1/2 pound andouille sausage, sliced into rounds
• 1 tablespoon Cajun seasoning, divided

For the vegetables:

• 1 red bell pepper, thinly sliced
• 1 green bell pepper, thinly sliced
• 1 small yellow onion, thinly sliced
• 2 cloves garlic, minced
• 2 tablespoons olive oil (for sautéing)

For the cream sauce:

• 2 tablespoons unsalted butter
• 2 tablespoons all-purpose flour
• 2 cups heavy cream
• 1 cup chicken broth
• 1/2 cup grated Parmesan cheese
• 1 teaspoon Cajun seasoning (adjust to taste)
• 1/2 teaspoon smoked paprika
• 1/4 teaspoon cayenne pepper (optional, for extra heat)

Optional garnishes:

• Chopped fresh parsley
• Grated Parmesan cheese
• Sliced green onions