Pare nicely six small fillets; cook three minutes, as directed in No. 509; put half a pint of Madeira sauce (No. 185) in a saucepan, with two truffles and six mushrooms, all cut in slices. Let cook for ten minutes. Nicely arrange six small, round croutons on the hot dish; dress the fillets over them, and pour the sauce around, but not over them; then serve.