Pork fillet brushed with olive oil. Rosemary, oregano, red and black pepper, savory mustard and pour in a mortar and crushed. Add some meat very well in the mixture of spices, put it in a suitable container, pour with soy sauce, cover with wrapping foil and collect it in the refrigerator for about 2 hours to marinate. Once the meat is kept in refrigerators, subtract and is coated with beaten egg yolks. Breadcrumbs mixed with a little oregano and savory meat and add some very well in it. In a wide pan (to allow the meat to cook and countries) in the middle ranks onion, cut into thick discs, the meat is put on the onion and pour very lightly with olive oil. The meat is baked in a preheated 200 ° C oven for about 45 minutes - 1 hour depending on the size of the piece of meat - but not more than one hour, they will become dry. After baking, the meat is removed from the oven and leave to rest for about 15-20 minutes. During this time the meat should not be cut, nabuchva or roof, they will lose their juiciness. Just before serving, cut into 1-2 cm discs. Just before serving is done and the sauce, which flooded the pieces of meat. Sauce: In a pan put the butter and olive oil. After melting of the butter is melted and put smoked feta cheese. When cheese is half melted, add the white wine, stir and add the cream. Stir constantly until the cheese is completely ripped and then add the spices. Optional in the sauce can be added and mushrooms. With so prepared sauce watered individual portions of meat. To the meat can be added to any trimmings vegetables, rice, potatoes.