In a large pot of boiling salted water, cook the rotini according to the package instructions until al dente. Drain and set aside.
In a large skillet, heat the olive oil over medium-high heat. Add the diced chicken breast and season with Cajun seasoning, garlic powder, salt, and pepper. Cook for about 5-7 minutes, or until the chicken is golden brown and cooked through.
Lower the heat to medium, then add minced garlic, red bell pepper, and cherry tomatoes to the skillet. Sauté for another 3-4 minutes until the vegetables are tender.
Pour in the heavy cream and stir well to combine with the chicken and vegetables. Let it simmer for 2-3 minutes until the sauce thickens slightly.
Add the cooked rotini to the skillet and toss everything together until the pasta is well coated in the creamy Cajun sauce. Gradually add the grated Parmesan cheese, stirring until fully melted and incorporated.
Taste and adjust seasoning with more salt or pepper if needed.
Remove from heat and garnish with freshly chopped parsley before serving.
Notes
Serve in deep bowls with extra olive oil and Parmesan for garnish.