Make a light roux of 2/3 of the butter and flour, dilute with milk and boil a little. When the mixture has cooled down, add the egg yolks, salt, pepper and 90 g finely grated feta cheese and mix well. Put them gradually beaten egg whites to stiff, the mixture is poured into an oiled form pudding (20 cm) and bake in a low oven until puddings initial rising and the surface get brown. Shortly before the end pieces are placed feta cheese and allow to melt. Serve the court in which the roast.