This Hummer Sandwich is a massive, meat-lovers sandwich loaded with roast beef, black forest ham and pastrami, then topped with provolone cheese and heated until melty. It’s a soft, sink-your-teeth-into-it, ooey, gooey, cheesey sandwich you will absolutely love! With Monday’s Easy Microwave Potato Chips recipe, I felt it was only appropriate to give you a monster sandwich to…