01 -
Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish.
02 -
Bring a large pot of salted water to a boil. Cook jumbo pasta shells until just al dente. Drain and set aside to cool slightly.
03 -
In a skillet over medium heat, warm olive oil. Add finely chopped onion and minced garlic, sautéing until onion is translucent and fragrant, about 3 to 4 minutes.
04 -
In a large bowl, combine shredded chicken, sautéed onion and garlic, ricotta cheese, 1 cup mozzarella, Parmesan cheese, egg, 1 tablespoon Cajun seasoning, salt, and black pepper. Mix thoroughly until evenly incorporated.
05 -
In a saucepan over medium heat, melt butter. Whisk in all-purpose flour and cook, stirring, for 1 minute. Gradually pour in milk and heavy cream while whisking to avoid lumps. Add 1 teaspoon Cajun seasoning and salt. Continue stirring until sauce thickens, about 5 minutes.
06 -
Spread half of the prepared sauce evenly over the base of the baking dish. Fill each cooked shell with the chicken filling and arrange filled shells in the dish over the sauce.
07 -
Spoon remaining sauce over the filled shells. Sprinkle with additional shredded mozzarella cheese. Bake uncovered for 20 to 25 minutes, or until the top is bubbly and golden.