Heat oven to 425°F. Spray large cookie sheet with cooking spray. Unroll pizza dough on cookie sheet; press into 15x12-inch rectangle. Bake 6 to 8 minutes or until light golden brown.
Spread 1/2 cup plus 2 tablespoons of the cooking sauce evenly over partially baked crust (more sauce will make crust soggy). Arrange peppers and onions evenly over sauce; top with spinach leaves. Sprinkle with cheese.
Bake 8 to 10 minutes or until crust is golden brown. Meanwhile, heat remaining sauce until hot. Sprinkle pizza with olives and pizza seasoning. Serve sauce with pizza as dipping sauce.