In a skillet, heat olive oil over medium heat. Add the diced chicken and season it with Cajun seasoning, salt, and pepper. Sauté until the chicken is cooked through and lightly browned. Remove from heat and set aside.
In the same skillet, add chopped onion, bell peppers, and garlic. Sauté for about 3-4 minutes until the veggies are soft.
Lower the heat and add the heavy cream to the skillet, stirring to combine. Bring it to a gentle simmer.
Stir in the grated Parmesan cheese until melted and smooth. Adjust seasoning if necessary.
In a large mixing bowl, combine the cooked penne pasta, sautéed chicken, and creamy Alfredo mixture. Mix thoroughly until pasta is well coated.
Transfer the mixture into a greased baking dish. Top with shredded mozzarella cheese.
Bake in the preheated oven for 25-30 minutes or until the top is golden and bubbly.
Once out of the oven, let it cool slightly before serving.
Garnish with chopped fresh parsley before serving for a pop of color.
Notes
Garnish with fresh parsley for added flavor and color.