Heat oven to 350°F. Lightly coat a 13x9-inch baking dish with nonstick cooking spray.
In a large bowl, stir together marinara sauce, Parmesan cheese, heavy cream and salt.
Add cooked pasta, chicken and spinach, stir until blended.
Place half of pasta mixture in prepared baking dish. Top with 1 cup shredded mozzarella cheese. Cover with remaining pasta mixture. Sprinkle with remaining mozzarella cheese.
Bake for 30 to 35 minutes, or until cheese is melted and mixture is heated through.
Heat oven to 350°F. Lightly coat a 13x9-inch baking dish with nonstick cooking spray.
In a large bowl, stir together marinara sauce, Parmesan cheese, heavy cream and salt.
Add cooked pasta, chicken and spinach, stir until blended.
Place half of pasta mixture in prepared baking dish. Top with 1 cup shredded mozzarella cheese. Cover with remaining pasta mixture. Sprinkle with remaining mozzarella cheese.
Bake for 30 to 35 minutes, or until cheese is melted and mixture is heated through.