Marinate the fillets with the brandy, pepper to taste and oregano. Marinate for one hour in the fridge or refrigerator.
Bring a frying pan over medium heat, add the bacon or bacon. Reserve once it is golden.
Bring a frying pan over medium heat; add a little butter, brown on both sides for approximately two to three minutes, adding pepper and salt
Place the fillets in a refractory dish with the bacon or bacon on top and with the marinade juice, cover with a little aluminum foil so that our preparation does not remain dry. Brown for five minutes in the oven.
Serve the fillets bathing with the roast juice and with the bacon or bacon on top. Enjoy.