Appears in Cook's Country October/November 2018, America's Test Kitchen TV
This big-city favorite takes grilled cheese to new heights.
WHY THIS RECIPE WORKS
We were looking for a truly impressive version of this French bistro favorite—one with crisp, buttered bread; salty-sweet ham; a creamy white sauce; and plenty of nutty Gruyère cheese. We chose to amp up the béchamel sauce called for in tra...