Divide dough into 4 equal pieces; roll each on lightly floured surface into a 6x8" rectangle. Arrange toppings in order given over half of each rectangle, leaving 1/2" border. Wet edges of dough with water; fold dough over fillings, pressing with fork to seal. In small bowl, combine egg and water; brush over top of dough with pastry brush. With a sharp knife, cut 3 (1") slits in top of each roll. Place on parchment-lined jelly roll pan; bake in a preheated 375° oven until golden-brown (20-25 min.). Serve immediately.