Here's how to do it:
Preheat your oven to 350* and grease (or spray) a baking sheet.
Whip up a batch of the best bread dough ever, or you can use a thawed loaf of Rhodes bread (found in the frozen section at most grocery stores). Roll the dough into a large rectangle roughly 1/4 inch thick. (It's OK to make it a tiny bit thinner if it holds together, but you don't want it any thicker than that. It's also OK if the rectangle is a bit wonky like mine.)
Carefully fold the empty side of the dough over to cover the filling.
Roll and pinch the edges so they are completely sealed.
Bake on the greased baking sheet for 20 minutes or until the top is golden brown.
(I can't figure out why this picture keeps publishing sideways. Sorry.)
This last time, I made two sandwiches. We ate one for lunch, but I popped the second one in the freezer bag after I sliced it so I could freeze it and then grab a slice or two to make lunch prep for my 3rd grader a snap. I hope it thaws in time! =)