Croque Monsieur (French hot ham and cheese sandwich)

Malzemeler

• Malzemeler
• 30 g butter (unsalted)
• 0.5 bardak cream (pure or heavy / thickened)
• 4 çay kaşığı Dijon mustard
• 1 yemek kaşığı flour, all-purpose
• 120 g ham slices
• 0.5 bardak milk
• 1 çay kaşığı nutmeg
• 3 yemek kaşığı parmesan, finely shredded
• 1 çay kaşığı pinch white pepper
• 0.25 çay kaşığı salt (cooking / kosher salt)
• 0.5 bardak shredded Gruyere cheese
• 4 dilim Sourdough bread slice
• 8 dilim Swiss or Gruyere cheese
• 25 g unsalted butter