Breaded Le Gruyère AOP Croquettes

Ingredients

• 150 g Le Gruyère – aged minimum 11 months
• 100 g Flour 1
• 0.5 dl milk
• 100 g butter
• 100 g Flour 2
• 1 egg yolk
• 100 g breadcrumbs
• 100 ml cooking oil
• 1 pinches salt