Cook the pasta in a large pot of salted boiling water until al dente.
While the pasta cooks, heat olive oil in a large skillet over medium heat.
Add the diced onion and bell pepper to the skillet, sautéing until softened.
Stir in the minced garlic and cook for an additional minute until fragrant.
Add the sliced Andouille sausage and cook until browned.
Sprinkle in the Cajun seasoning, stirring to coat the sausage and vegetables.
Pour in the diced tomatoes with their juices, stirring to combine.
Reduce heat and stir in the heavy cream, simmering gently until combined.
Toss the cooked pasta with the sauce in the skillet, combining thoroughly.
Season with salt and pepper to taste, garnishing with fresh parsley before serving.
