When I was in grade school, one of the biggest hits our lunch staff came up with was Hot Baloney and Cheese sandwiches. They were a hamburger bun with a piece if baloney, american cheese, and a mustard based sauce. They were wrapped in aluminum foil and baked and were far and away one of the fondest memories I have of the grade school lunch experience. I’d get three and two milks, one chocolate, one white.
Another delicacy of my youth was one of my mom’s favorites. She would buy something that out butcher recognized as "Hillbilly Meat", then fry it up with pepper cheese. I found a local place that sold the meat years ago and got my kids eating it for lunch. I think the meat was called Ham Sausage in reality, but I’ll have to check with mom.