Step 1

Heat oven to 350°F. Spray 13x9-inch (3-quart) baking dish with cooking spray. Cook and drain pasta shells as directed on box.

Step 2

Meanwhile, in medium bowl, mix mayonnaise, spinach, artichoke hearts, garlic, 1 cup of the cheese, the salt and pepper.

Step 3

Fill each pasta shell with a tablespoon of the spinach mixture; place in baking dish filling side up. Top filled shells with Alfredo sauce, and sprinkle with remaining 1/2 cup cheese.

Step 4

Cover; bake 30 minutes. Uncover; bake 5 to 10 minutes longer or until heated through and cheese is melted. Serve warm.