Our local rural electric cooperative magazine has a recipe section and I found a very simple recipe called 1930’s Depression Casserole. Instead of boring you with the minute details, I’ll give you the simple version.
peeled and boiled potatoes
peeled and boiled eggs
saltine crackers (soda crackers)- crushed
medium white sauce (well salted and peppered)
Basically all it is is layering the slicedpotatoes, sliced eggs, and sauce in a buttered casserole and topping it with crushed crackers. Bake in a slow oven until heated through. I can only imagine this tasting even better with some cheese in it or a little ham but since it is a depression recipe, these were probably hard to come by back then.