Preheat the oven to 200°.
Cut each pitta bread into two disks and put them on the oven tray, smooth side up. Add a dollop of Pizza a Casa on top and spread it over the surface of the pitta bread. Add the mozzarella and mushroom slices evenly, and season to taste with pepper. Put the mini pizzas in the oven for 8 minutes. Garnish with rocket. Buon Appetito!