Creamy Cajun Chicken and Sausage Alfredo Pasta

Ingredients

• 12 oz (340 g) penne pasta
• 1 tablespoon kosher salt, for the pasta water
• 1 cup (240 ml) reserved pasta water
• 1 lb (450 g) boneless skinless chicken breast, cut into bite-size pieces
• 2 tablespoons Cajun seasoning, divided
• 1/2 teaspoon black pepper
• 1 tablespoon olive oil
• 8 oz (225 g) andouille sausage, sliced
• 1 small yellow onion, thinly sliced
• 1 red bell pepper, thinly sliced
• 3 cloves garlic, minced
• 2 tablespoons unsalted butter
• 1 1/2 cups (360 ml) heavy cream
• 1/2 cup (120 ml) low-sodium chicken broth
• 1 1/4 cups (115 g) freshly grated parmesan cheese
• 2 tablespoons chopped fresh parsley
• Optional: sliced green onions or extra parmesan for serving