Cook 12 ounces rotini according to package instructions.
While the pasta is cooking, combine 15 ounces ricotta cheese, 2 eggs,1 cup shredded mozzarella cheese, 3 tablespoons minced fresh parsley, and salt and pepper to your preference in a medium bowl; stir to mix well.
Preheat oven to 350°F.
Spray the bottom of an 11x17-inch baking dish with non-stick cooking spray.
When pasta is ready, drain and return to pot.
Add 28 ounces prepared Alfredo sauce to hot cooked pasta and stir gently.
Layer half of pasta mixture in the prepared baking dish.
Top with cheese mixture and layer with remaining pasta mixture.
Bake covered at 350ºF for 35 to 40 minutes or until bubbly.
Remove from oven, uncover, and top with 1 cup shredded mozzarella cheese. Bake uncovered for 5 minutes or until cheese melts.