The sauce and gooey cheese make this a knife-and-fork sandwich.
Croque monsieur (which translates to “mister crunchy bite”) is one of the most iconic French bistro dishes, often served at lunch or as a snack at the bar. Thin slices of ham are topped with grated Gruyère and a rich, creamy Mornay sauce. The sauce and gooey cheese make this a knife-and-fork sandwich.