|4 tsp||Dijon mustard|
|4 slices||sliced cheese (e.g. Gruyère, Gouda)|
|200 ml||sauce Mornay|
|150 g||hard cheese (e.g. Gruyère, Parmesan)|
Preheat oven to 200°C/390°F. Place half of toasts on a parchment-lined baking sheet.Spread an even layer of mustard over them . Follow up with a slice of ham, a slice of cheese, and an even layer of part of the sauce Mornay.
Top with remaining toast. Spread an even amount of remainder of sauce Mornay on top of each croque monsieur and then grate hard cheese on top. Place in preheated oven at 200°C/390°F for approx. 5 – 10 min. until cheese is golden and melted. Enjoy!