Croque Tartiflette - cooking recipe

Ingredients

2 tablespoons mustard
8 tablespoons bechamel sauce, divided
8 slices sandwich bread
4 ounces baked ham, thinly sliced
8 thin slices cooked red potatoes
8 slices reblochon cheese (enough to fill 4 sandwiches)
4 tablespoons butter, softened

Preparation

Preheat the broiler to the lowest heat setting.
Evenly divide and spread the mustard on 4 slices of bread. Place a few slices of ham, followed by 2 slices of potatoes, 2 slices Cantal, and 1 tablespoon of Bechamel on the mustard-side of the bread. Cover the cheese with the remaining slices of bread and spread the butter on the outside surfaces of the sandwiches.
Place the sandwiches on an ungreased baking sheet and broil for about 5 minutes, turn them over, and continue cooking until they are crispy and golden brown, about 5 additional minutes. Spread the top of the sandwich with 1 tablespoon Bechamel and serve while hot.