In a large skillet, heat olive oil over medium heat. Add the diced onion and bell pepper, sautéing for about 3-4 minutes until the vegetables soften.
Add the minced garlic and ground turkey to the skillet, cooking until the turkey is browned and cooked through, about 6-8 minutes.
Stir in the Cajun seasoning, ensuring the turkey is evenly coated with spices.
Add the diced tomatoes, chicken broth, and penne pasta to the skillet. Bring the mixture to a simmer, cover, and cook for 12-15 minutes, or until the pasta is al dente, stirring occasionally.
Once the pasta is cooked, reduce the heat and stir in the heavy cream. Cook for an additional 2-3 minutes until the mixture is creamy.
Sprinkle the shredded cheddar cheese on top and stir until melted and well combined.
Season with salt and pepper to taste.
Remove from heat and garnish with chopped fresh parsley before serving.