Preheat the oven to 400F and position the oven rack in the middle of the oven. Line two baking sheets with parchment paper and place 3 flatbreads on each.
Spread 3-4 tablespoons of hummus onto each flatbread, and top with olives, roasted red peppers, and cheeses.
Bake one tray at a time, for 7 minutes, until cheese is bubbly and melted. Carefully remove from oven and serve.