This makes me WAY too hungry too!
Unless in an area where people flow in around the clock, who needs to have everything available 24/7? Why not use a chalkboard that lists your "blue plates" until they run out? For example, regulars know the lunch specials come on line at 11:00 or 11:30, and learn to come early for best selection. For less busy times, the regular menu features comfort items made to order, soups, etc. If you can somehow get people to lap up frozen and then reheated meals, go for it, but this seems to be compromising the "home cooking" theme we have going here.