Dragomir Forshmak
It still wouldn't surprise me if that was Bela Lugosi, or, Bela Bartok's real name. Another one of my old time family favorites.
With the combination of onion, potato, and sour cream, its origin lies in Eastern Europe; and it's always fun to step into someone else's culture. With today's lighter living the substitutions make it possible to make this very low-cal; but first, try it the way it was intended.
Simmer onions in a large skillet butter until soft, then add flour to make a roux. Add broth, stirring well, take off heat and add sour cream, DO NOT BOIL. Stir in cooled potatoes, ham, and pickles. Put in greased, shallow casserole, sprinkle with Parmesan, and bake until lightly browned, about 35-40 minutes.