AT A GLANCE
This French classic is traditionally made with béchamel sauce; our method is simpler and uses crème fraîche. Top it with a fried egg and you have a croque-madame.
|01||Preheat oven to 180C. Combine Gruyère, crème fraîche and mustard in a bowl, season to taste, mix well. Spread thickly over bread slices, then top half the bread slices with ham. Top with remaining bread slices, cheese-side up, and set aside.|
|02||Melt half the butter in a frying pan over medium heat until foaming, add half the sandwiches, cheese-side up, cook until base is golden (1-2 minutes), transfer to a baking-paper-lined oven tray. Wipe out pan with absorbent paper, repeat with remaining butter and sandwiches. Bake until bubbling and golden (5-10 minutes), serve immediately.|