This egg salad supposedly originated with a chef who cooked for European royalty before a stint at the National Casino in Budapest, Hungary. Odds are you won’t find this delicious dish on any Las Vegas or Atlantic City menu, but it is a sure bet for lunch or at the dinner hour. Butter and sour cream lend a rich foundation, but it’s still lighter than a typical mayonnaise-based egg salad. And the anchovies add a hint of salt and briny depth. This is terrific served with lettuce and fresh vegetables as a salad, or with lettuce and tomato on toast as a sandwich.