Croque-Monsieur by Juan Arbelaez | Opinel Grande Bretagne

Ingredients

• 5 slices of sandwich bread
• 4 slices of white ham
• 1 handful of grated Gruyère cheese
• 50 g butter
• 50 g flour
• 50 cl milk
• 150 g grated Gruyère cheese
• 1 pinch of salt
• 4 turns of the pepper mill
• 1 Baking sheet
• 1 scale
• 1 blender
• 1 flat spatula
• 1 rubber spatula