Bottom and sides of casseroles are coated with butter. A tomato cut into thin slices, which are glued on the butter. The cheese is cut into pieces long as the walls of casseroles and placed on the tomatoes. Insert another line tomatoes. In the resulting nest is crushed feta cheese. Pour a little water - up to 1/4 of casseroles and break an egg. Pour on the 2-3 small pieces of butter. Pierce the yolk lightly with a sharp knife and bake in preheated oven.