Preheat oven to 350 degrees F. and line 2 large baking sheets with parchment or a silpat liner.
Unfold puff pastry and slice each sheet into thirds. Place each piece onto baking sheets, spacing about 1 or 2 inches apart.
On each puff pastry piece, spread a thin layer of hummus, top evenly with shredded chicken pieces, arugula leaves, roasted red peppers and mozzarella cheese. Bake for 25-35 minutes or until cheese is melted and pastry is puffed and golden. Remove from oven, let cool for 5 minutes then serve warm.