I used to each lunch at a cafeteria style bar-b-que place in Dallas. I noticed that if you ordered the sandwiches open face, they’d put a portion of meat on the two buns and, with you looking on, they’d see that not all that much of the buns was covered, so they’d put on some more. If you ordered just a sandwich, they’d put all the portion on just one bun, close it, and that was what you got. Once I realized that, I always ordered open face.
Something to remember.