Croque madame. Bread, cheese, and ham. Layered together in melty goodness, plus an egg on top, yolk all runny and perfect. When I did go to restaurants while in Paris last summer (which wasn't terribly often), I was tempted to order this every time because it's so good! Also with the commonly elaborate descriptions of menu items at French restaurants, croque madame was often the first or only item where I understood what it was. Haha. But seriously, try it sometime!