Peel and finely dice the shallots. Wash the thyme, shake dry and remove the leaves from the stalks. Clean the porcini mushrooms and clean them with a brush or kitchen paper, wash briefly if necessary.
Cut in half lengthwise.
Dab the fillet dry and cut into 4 steaks. Heat 1 tablespoon of oil in a frying pan. Fry the fillet steaks in it for about 3 minutes on each side. Season with salt and pepper. Take out, wrap in aluminium foil and leave to rest.
Heat 1 tablespoon of oil in the frying fat. Fry the mushrooms and shallots for 5-7 minutes while turning them. Season with salt, pepper and thyme.
In the meantime cut the baguette into slices. Heat 2-3 tablespoons of oil in a second pan. Fry the baguette slices on each side until golden brown.
Arrange steaks with mushrooms. Pour gravy from the steaks into the stock, bring to the boil and drizzle over steaks and mushrooms. Add baguette.