Cook the pasta according to package instructions until al dente. Drain and set aside.
In a large skillet, heat olive oil over medium heat.
Add the chopped onion and bell pepper, sautéing until softened.
Stir in the minced garlic, cooking for an additional minute.
Add the shrimp to the skillet, sprinkling with Cajun seasoning.
Cook the shrimp until they turn pink, about 3-4 minutes.
Pour in the heavy cream, stirring to combine.
Add the grated Parmesan cheese, mixing until melted and creamy.
Toss the cooked pasta into the sauce, ensuring it's well coated.
Garnish with chopped parsley and serve immediately.