01 -
Bring a large pot of salted water to a boil and cook penne pasta until al dente; drain and set aside.
02 -
Sauté peeled shrimp with Cajun seasoning in a skillet over medium heat until pink and opaque, about 3 minutes.
03 -
In a large bowl, mix cooked penne, sautéed shrimp, Alfredo sauce, and diced bell pepper until thoroughly combined.
04 -
Transfer the mixture into a baking dish and evenly sprinkle shredded mozzarella cheese over the top.
05 -
Bake in a preheated oven at 375°F for 20 minutes, or until cheese is golden and bubbling.