Classic Croque Monsieur ready to Bake 2 PcsThe Croque Monsieur is a classic of French cuisine, adored for its simplicity and delicious taste. This warm and comforting sandwich stands out for its perfect blend of textures and flavors. Oven cooking : For a more gratin version Preheat the oven to 210C (410F). 1. Place in the oven for 15 20 minutes, until the cheese has melted and the bread is golden brown. 2. You can then put them on the grill for 3 to 4 minutes to brown the cheese. Serve and