Heat oven to 400°F. Grease cookie sheet and hands. Press dough into 12x10-inch rectangle on cookie sheet.
Bake 10 to 12 minutes or until edges are beginning to brown. Meanwhile, in medium bowl, mix Alfredo sauce and chicken; spoon evenly over partially baked crust. Top with spinach and cheese.
Bake 8 to 10 minutes longer or until crust is deep golden brown and cheese is melted. Cool 5 minutes before serving.