The more I think about it, the "oyster stew" on Christmas eve had to be from the Irish side of the family.
The family recipe is exceedingly simple - 1 can of oysters, 2 quarts (or so) of milk, butter and pepper to taste. Heat oysters and butter, add milk and pepper. Serve with crackers.
All my brothers and sisters loathe it. My mother and I are the only people who will eat it.