Bake at 450°F for 4 minutes in an impingement oven, at 500°F for 5 minutes in a deck oven, or until cheese is bubbly and melted.
3Arrange 2 slices prosciutto and 1/2 oz. arugula over half of flatbread; drizzle 1/2 tbsp. balsamic glaze over toppings. Cut into 4 wedges.
4Arrange wedges on appetizer plate with 2 oz. Alfredo sauce portioned in a ramekin.