Shell Preparation: Begin by cooking jumbo pasta shells according to package instructions until al dente, then drain and set aside.
Chicken Filling: Prepare a creamy chicken filling by mixing shredded rotisserie chicken with ricotta cheese, grated Parmesan, minced garlic, and Italian seasoning.
Stuffing Shells: Stuff each cooked pasta shell with the creamy chicken mixture, ensuring they are evenly filled for maximum flavor in every bite.
Baking Dish: Arrange the stuffed shells in a baking dish, then top them with marinara sauce and a sprinkle of mozzarella cheese for added creaminess and flavor.
Bake: Cover the baking dish with foil and bake in a preheated oven until the cheese is melted and bubbly and the shells are heated through.
Serve: Once cooked, remove the dish from the oven, garnish with fresh parsley or basil if desired, and serve the creamy chicken stuffed shells hot.