Heat oven to 400°F. Spray cookie sheet with cooking spray. Unroll dough on cookie sheet, forming 14x11-inch rectangle.
Spread garlic and herb cheese lengthwise down center 1/3 of rectangle to within 1/2 inch of short ends. Top with Canadian bacon, pepperoni, mozzarella and Parmesan cheese.
With scissors or sharp knife, make cuts 1 inch apart on long sides of dough to within 1/2 inch of filling. Alternately cross strips over filling. Fold ends under to seal.
In small bowl, mix egg yolk and water until well blended. Brush over dough; sprinkle with poppy seed.
Bake 11 to 16 minutes or until golden brown. Cut into crosswise slices. Serve with pizza sauce.