Unroll Crust Into A Greased 15-In. X 10-In. X 1-In. Baking Pan; Flatten Dough And Build Up Edges Slightly. Brush With Oil; Sprinkle With Garlic. Spread With Pizza Sauce. Layer With Spinach, Onion, Mushrooms And Cheeses. Sprinkle With Basil, Italian Seasoning And Pepper Flakes If Desired. Bake At 400