We didn't call it SOS but grew up with it on biscuits and at times chipped beef instead of burger. Had similar version with tuna and called it goopey goo served on toast. Sounds really bad, but with 7 kids you were the quick or the hungry !
Agree with poster above, great bacon, huckleberry pancakes and maple syrup is tough to top for breakfast. But the Red Trout Filet at Peeps in Coeur d'Alene with Hollandaise is really good.