Wash, peel and cut the potatoes into thick slices and boil them in water 10-12 minutes, without letting them fully cook. Strain and dry thoroughly.
Heat 4 tablespoons of oil in a pan and when it is hot, brown the potatoes to taste. Remove, dry and set aside.
Heat a griddle and when it is hot, place on it the fillets coated with 2 tablespoons of oil, Worcestershire sauce and various peppers. Remove when grilled and let stand on a plate.
Add the wine to the griddle to let it mix with the liquid from the meat. Reduce it a little bit and add the potatoes. Heat and remove.
Serve the fillets and the potatoes hot and add the sauce.