I got this from the Extension Office back in 1982. They had a class on economical meals for the "Recession". It's actually pretty good and seems to use some prep foods..

1 package yeast in 1/4 c warm water
1 7oz can evaporated milk
3 1/2 c rolled oats
1 chopped onion
1 tsp salt
2 eggs
1 can cream of mushroom soup

Combine yeast and milk. Add rest of ingredients, except soup. Let mixture stand for a few minutes, thaqn form into patties and brown in hot oil. Put in casserole. Spoon on soup. Bake at 375 degrees for twenty minutes...