Preheat the oven to 400 degrees. Line a sheet pan with parchment paper.
Roll the pizza dough into a rectangle that covers the area of the sheet pan, leaving a 1 inch border on all sides.
Place the marinara sauce, 1/2 of the cheese, ham and pepperoni down the middle of the dough. Add the remaining cheese on top of the meats.
Cut 1/2 inch strips on the sides of the dough with a pizza cutter, then alternatively criss cross one strip of dough from each side to make a pattern, folding the edges over on the top and bottom of the stromboli.
Brush the lightly beaten egg over the top and sides of the dough.
Bake for 15-20 minutes or until stromboli is golden brown and cheese is melted.
Top with chopped parsley if desired, cut into slices, and serve with marinara sauce for dipping.