Hamburger Gravy
Ground beef browned and folded into a peppered milk or stock gravy: a mess-hall and school-cafeteria staple. Served over toast, rice, or mashed potatoes; kin to SOS.
The Military Tradition
The armed forces codified gravy cooking at scale: creamed chipped beef on toast — SOS — and hamburger gravy fed generations of service members and then their families.
Creamed Chipped Beef on Toast (SOS)
Creamed chipped beef on toast: dried beef folded into a white sauce over toast points. The military plate — SOS — that came home from the mess hall to the diner.
Hamburger Gravy over Toast
Ground-beef gravy ladled over toast points: the cafeteria and farmhouse descendant of SOS, and a main-dish plate in its own right.