Place flatbread on cookie sheet. Bake 2 minutes. Remove from oven. Spread sauce on flatbread. Lay provolone on top of sauce. Top with mozzarella and pepperoni. Return to oven and bake 4 more minutes, or until cheese melts.
Grilling method: Heat grill to 375°F. Pre-bake flatbread on grill for 2 minutes. Remove from grill. Spread sauce on flatbread. Lay provolone on top of sauce. Top with mozzarella and pepperoni. Return flatbread to grill. Close lid. Grill for 4 minutes, or until cheese melts.
