2. While the oven is preheating place the balsamic vinegar, honey, and black pepper into a sauce pan and turn the heat to a medium-high. Stirring frequently until reduced to a syrupy density. About half the volume.
3. Meanwhile while the Balsamic Vinegar is reducing spread the cream cheese on the flatbread. Place the roast beef slices on the cream cheese. Next spread the peppers and onions evenly over the pizza. Slice the fresh mozzarella and evenly place over the peppers and onions. Sprinkle the parmesan cheese over the mozzarella. Bake until cheese is melted, then broil until cheese browns to your liking. Remove from oven and drizzle the balsamic reduction over pizza, slice, and serve.