Heat oven to 425. Spray 12-inch pizza pan with nonstick cooking spray. Unroll dough; place in sprayed pan. Starting at center, press out dough to edge of pan, pressing up and extending over sides by at least 1 inch. Place string cheese around inside edge of crust. Fold extended edge of dough over cheese; pinch firmly to seal.
Bake at 425 for 8 to 10 minutes or until crust is set and edges are light golden brown.
Removed partially baked crust from oven. Spoon sauce evenly over crust. Top with pepperoni and italian cheese blend.
Return to oven; bake an additional 12 to 16 minutes or until crust is deep golden brown and cheese in center is melted. Cut into wedges.