Cook the rotini pasta according to package instructions; drain and set aside.
In a large skillet, heat olive oil over medium heat.
Add sliced sausage and cook until browned, about 5-7 minutes.
Stir in diced onions and bell peppers; sauté until softened, about 5 minutes.
Add minced garlic and cook for another 1-2 minutes until fragrant.
Pour in chicken broth and bring to a simmer.
Mix in heavy cream and Cajun seasoning; stir well.
Add the cooked pasta to the skillet, tossing to combine.
Season with salt and pepper to taste, adjusting as needed.
Garnish with fresh parsley before serving.