Heat oven to 375ºF.
Divide bread dough into 4 pieces.
Roll each into 6-inch round, sprinkle each with spinach. Top with cheese and turkey.
Starting at one end, roll the dough, jellyroll style, and seal dough at the bottom and ends. It will be the size and shape of a hot dog bun.
Place on a parchment-lined baking sheet, cover with plastic wrap and allow to rise 20 minutes.
Brush top of dough with egg.
Cut a couple of ½-inch vent slits in the top of each roll.
Bake 25 to 30 minutes or until golden brown.
Serve with marinara sauce for dipping, if desired