Slightly warmed milk and added crushed beef stock, in order to dissolve better. Add processed cheese, onion juice and stir well until a nearly homogeneous mixture. Add flour and mix well. The salt was finally added, if necessary. Steaks rank in the tray (25h30 cm) and pour on them topping. Bake in preheated oven until ready, the sauce should toughen visually baked on top.