Bring a large pot of salted water to a boil and cook the 8 lasagna noodles according to package instructions until al dente. Drain and lay them flat on a clean kitchen towel or parchment paper to prevent sticking.
In a large skillet, heat 2 tablespoons of olive oil over medium heat. Add the cooked, shredded chicken breast and sprinkle with 2 teaspoons of Cajun seasoning, 1 teaspoon garlic powder, 1 teaspoon onion powder, salt, and pepper to taste. Stir well to coat the chicken evenly with the spices. Remove from heat and transfer to a mixing bowl.
To the bowl with the seasoned chicken, add 1 cup ricotta cheese, 1 cup shredded mozzarella cheese, 1/2 cup grated Parmesan cheese, and 1 cup heavy cream. Stir until the mixture is creamy and well combined.
Preheat your oven to 375°F (190°C). Lay one lasagna noodle flat and spread an even layer of the creamy chicken mixture down the length of the noodle. Carefully roll the noodle from one end to the other, making a tight roll. Place the roll seam-side down in your baking dish. Repeat with the remaining noodles and filling.
Pour 1 cup marinara sauce evenly over the lasagna rolls in the baking dish. Cover with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 10 minutes until bubbly and lightly golden on top.
Once baked, remove from the oven and let the rolls cool slightly. Garnish with freshly chopped parsley for a fresh, vibrant finish. Serve warm and enjoy the creamy, spicy goodness in every bite!