HEAT oven to 400ºF.
UNROLL pizza dough; press onto bottom and up sides of 15x10x1-inch pan sprayed with cooking spray.
ARRANGE string cheese around edges of dough; fold over edges of dough to enclose cheese, pressing seams of dough together to seal. Bake 10 min.
SPREAD pizza sauce onto bottom of crust; top with shredded cheese and tomatoes.
BAKE 20 min. or until edges of crust are golden brown; top with basil.