At Ramova Grill a few weeks ago a friend ordered chili with beans while I opted for beanless. The little pile of beans next to one of the bowls left no doubt which was which.

That got me to wondering about how cooks at restaurants identify different but similar-looking foods so servers can tell them apart. I would guess that certain of these schemes go unnoticed by many diners. A couple more examples came to mind.
John's Famous Stew in Indianapolis serves their signature dish at three spice levels. Hot is served in a red bowl, medium in yellow, and mild comes in white.

The Cavalier Inn, Hammond's great Polish tavern, offers three varieties of pierogi. Each type is sealed differently: forked (3 o'clock), fluted (6 o'clock) or plain (8 o'clock).

Waffle House is known for their
cooks' code that enables them to keep track of multiple orders without writing. As I understand it (never been to a WH), the cook removes the cues before the food is plated. Any favorite examples of tricks used by cooks to help servers distinguish foods that might otherwise look alike?