This dish is served as an entree for luncheon, and is a particularly good as well as mysterious dish, for having a soft egg inside a croquette seems a difficult thing to get. Poach the eggs French style, using care to have them round and just firm enough to hold in shape. Lift them carefully on a strainer, and place them on the bottom of an inverted pan, leaving a space between them. When they are cold trim them, carefully removing any ragged ends of white, and wipe them dry. Make a Villeroi sauce. When it is partly cooled, pour it with a spoon over the eggs. It should form a thick coating. When it is cold and well set, trim each egg neatly again, cutting away any of the sauce that has run over the pan. Have some soft, white crumbs, grated from the loaf or rubbed through a coarse sieve, and mixed with grated cheese. Lift an egg on a broad knife, and place it on the crumbs. Cover it with as many crumbs as will adhere. Lift it again on the knife into a dish containing beaten egg, and with a spoon moisten it well with the egg. Then place it on fresh, white crumbs that are not mixed with cheese, and cover it completely. It can now be handled with care and turned into good shape in the crumbs. Let the breaded eggs stand until just ready to serve, then place three or four at a time in a wire basket, and plunge them in smoking hot fat to take a delicate color. Do not let them become deeper than lemon color. Place a spoonful of Villeroi sauce on each plate, using the sauce left from coating the eggs and thinning it with stock; place an egg on the sauce and serve at once. Chopped truffles mixed with the sauce improves it.