Parboil them as just explained. Just before serving cut them in even-sized pieces, sprinkle them with pepper and salt, egg and bread-crumb them, and fry them in hot lard. They are sometimes immersed in boiling lard, yet oftener fried in the saute pan. If saute, when done put them on a hot dish, and turn out part of the lard from the saute pan, leaving about half a teaspoonful. Pour in a cupful of milk thickened with a little flour. Let it cook, stirring constantly and season with pepper and salt; strain it and pour it over the sweetbreads. With green peas, serve without sauce. Sometimes they are served whole with cauliflower or asparagus heads, when the cream sauce is poured over both. They are excellent with tomato sauce or with macaroni cooked with cheese.