Preheat oven to 425 F.
Cook meat in a nonstick skillet over medium-high heat until browned, stirring until it crumbles. Drain if necessary, and return to skillet. Add tomato sauce, and cook until heated.
While meat cooks, coat a 13x9-inch baking dish with cooking spray. Unroll pizza crust dough, and press into bottom and halfway up sides of baking dish. Tolp bottom of pizza crust with meat mixture.
Bake, uncovered, at 425F for 12 minutes. Top with cheese, and bake 5 minutes or until crust is browned and cheese melts.
Cool 5 minutes before serving.